Savanna City

What was the purpose of the project

Savanna City is a Mixed Use Development aimed at providing jobs and housing to the local area 

Was the project  envisaged in steel from the start (Roofing)

Phase 1 of the project was done with timber rafters, and after several meetings we decide to change the roof structure to Ultraspan Light Steel Trusses due to the availability and quality of timber

Give a brief description of the structural framing

Mitek Ultraspan Light Steel material were used

Rafter/Cord Sizes: 64, 89, 140 and 184

Give a brief description of the LSFB

With the Ultraspan material being so light, it made it easier to handle and erect. Less time was spend on erecting these roofs and Waveroofing was able to save some costs.

Were there any challenges

NO – The advantages of using Ultraspan Light Steel Trusses – transport was no longer an issue. We could deliver 100 roofs at a time because no pre-fabrication were required. All trusses could be assembled on-site.

What is special/innovative about the project

Being such a Mega Project we were able to help the environment by using an Eco-Green product. Waveroofing had the opportunity to deliver a product that can change the future of the roofing industry and so we also create jobs within the community. Waveroofing got the community involved through a training session of how to erect a roof and to handle power tools. We also trained woman/females to read roof plans and erect the roofs because of the light weight of the trusses been used.  

How did the project team work together

There were some challenges at first because we had to make use of unskilled Labour, but because of our involvement in the project we managed to work very well with the contractors and our newly trained carpenters on site. Training and open communication with the site foreman’s made it a successful job done 

Span of trusses and kg/m2 (if applicable) 6.611 kg/m2

Profiles used: Ultraspan Light Steel Trusses

Project Team

Project Team Role Company
Nominator MiTek
Client/ Developer Basil Read
Architect Malankane
Structural Engineer Malankane
Engineer Not provided by nominator
Quantity Surveyor Not provided by nominator
Project Manager Not provided by nominator
Main Contractor Not provided by nominator
Steelwork Contractor Wave Roofing
Steel Erector Wave Roofing
Cladding Manufacturer Not provided by nominator
Cladding Supplier Not provided by nominator
Cladding Contractor Not provided by nominator
Corrosion Protection
Galvanising
Not provided by nominator
Corrosion Protection
Paintwork Contractor
Not provided by nominator
Photographer, Photo competition Not provided by nominator
Photographer, Other submitted images Not provided by nominator

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.

SA Airlink

SA Airlink is an international flight training facility for pilots that airline Airlink created in conjunction with Brazilian Aircraft Manufacturer, Embraer. Embraer has brought in full flight simulators to train international pilots on their aircrafts at the facility.

The brief to the architect was to design an internationally rated flight training facility that could compete with similar training centres across the globe. The architect was sent to other international training facilities to obtain information about what world-class training centres offered pilots and their goal was to design a flagship facility that could be marketed to international companies and pilots. The flight training facility had to include practical training areas, class rooms, full flight simulator facilities, a new departure lounge for SA Airlink’s flight operations as well as a heavy maintenance facility where maintenance on aircrafts could be done.

Certain parts of the training facility were envisaged in steel from the start. The architect’s inspiration for the facility’s design was aircraft fuser lodges, which led to a design that included unique, curving shapes of the building. The shapes and cladding wouldn’t have been achieved without the use of steel.

The simulator bay of SA Airlink has curved I beams. The design team tried to roll the six sections but rolling led to buckling. To overcome this challenge, the contractor bended and welded the beams together to obtain the desired curved shapes.

The office sections of the facility have very high shopfronts. To frame these areas, the team installed 254 columns with beams, which contributed to the modern, industrial look and feel that the architect wanted to achieve. There are also two hollow tube columns with expertly designed knuckle joints at the front of the building that simulates aircraft landing gear.

A lot of consideration was paid to the insulation of the building. Being situated next to one of the runways, the design team had to achieve a certain decibel rating to ensure a good acoustic environment for trainers and pilots. The isoboard was installed before the cladding.

Another challenge related to the cladding process was to minimise the clashing of services during installation. Due to the curved shape of the building, the cladding had to be rolled to a specific profile that had two different radius cranks, one of which is quite sharp.

The fabricators, engineer, contactors and steel contractors worked closely with the architects from the start. There were many services that had to go into the facility – including specific air conditioning ducts and mechanical elements – and coordinating the project execution required a team effort. The result is a world class facility to train pilots with state of the art equipment.

Cladding profile/ type used Klip-Tite & Corrigated
Cladding area/ coverage 1425m2
Cladding tonnage 8 Tons

Project Team

Project Team Role Company
Nominator Global Roofing Solutions
Client/ Developer Comair
Architect Skylan Architectecture and Design Studio

 

Structural Engineer P Design CC

 

Engineer Not provided by nominator
Quantity Surveyor Quanticost Quantity Surveyors
Project Manager Not provided by nominator
Main Contractor Belo & Kies Construction (Pty) Ltd

 

Steelwork Contractor Pretorius Staalwerke
Steel Erector Not provided by nominator
Cladding Manufacturer Global Roofing Solutions
Cladding Supplier Global Roofing Solutions
Cladding Contractor Roofing Guarantee (Cladco completed this project)
Corrosion Protection
Galvanising
Not provided by nominator
Corrosion Protection
Paintwork Contractor
Not provided by nominator
Photographer, Photo competition Not provided by nominator
Photographer, Other submitted images Not provided by nominator

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.

Rosebank Link

What is the purpose of the structure/project?

At 15 stories above the ground, the building consists of two basement parking levels, a ground floor or public/retail level, five parkade levels, and nine stories of offices from a podium level. It will allow everyday pedestrians to traverse without barriers from the Gautrain through to the adjacent malls.

What was the brief to the Architect?

As a building standing foremost in the center of a developing cosmopolitan area, the client wanted to have a unique building that served the needs of the client, its neighbors, as well as the public in a new, exciting, and smart way.

Was the project envisaged in steel from the start? If not, why was it built in steel in the end?

Yes, Meeting Pods, Atrium, and Media screen.

Meeting Pods:  The Meeting Pods can be viewed from the landscaped thoroughfare which forms part of the showpiece of the buildings. The architectural intent for the pods is to be as open as possible, embedded in the glass. These pods are also cantilevered from the concrete frame and was a retrofit.

Atrium:  The Atrium structure formed part of the glass façade, spanning over six stories, additionally it formed a part of the glass skylight structure on the Atrium roof. The structure spanned large distances and had to be as slender as possible while limiting deflection.

Media screen:  The LED panels required special connections at very particular points, while constrained by the removal time by the crane, steel allowed achieving these challenges.

Give a brief description of the structural framing. What type of sections were used (e.g. hollow, cellular, I-beams etc) and why?

Meeting pods:  Gravity loads were the main consideration; therefore, the loads were concentrated around one axis and normal I-section portals bolted to the concrete were the most efficient.

Atrium:  The inner–and bottom chord of the Atrium vertical truss and roof truss were determined by architectural constraints. The outer chord is braced by transom beams for the façade glass, however, the inner chord had a large unbraced length due to the omission of regular knee-bracing. Similarly, the bottom chord had a large effective length for the uplift load case, due to knee bracing not being able to pierce the bulkheads of the skylights butting up snug to the truss either side. This resulted in a relatively large PFC inner chord and large I-section for a bottom chord. The purlins (bracing for the top chord) of the roof had to step, due to the skylight glass line and sheeting line being on different levels. Additionally, the purlins form part of the skylight substructure. The load path was fairly two dimensional and an RHS section was used. For the Atrium glass transoms, large SHS were used due to the wind, and gravity load cases being very similar correlating the sections’ similar radii of gyration in each direction, it was also aesthetically preferred.

Media screen:  The screen consisted of a large SHS outer frame, as the facade and surrounding over cladding required a 200mm flat fixing face, it was also beneficial at the one end, as a part of the screen had to remain cantilevered to span across the crane void, which would only be filled later with structure. Considering hollow sections’ optimal spread of material away from the center of gravity it gave good results when relating stiffness/size ratios.

Were there any challenges in the fabrication of the project from the Engineer’s design – if yes, please tell? Tell more about fabrication and erection process if it was complex, difficult, innovative etc.

The manufacturing was straightforward, the main difficulty was during erection, the site has virtually no laydown areas with very limited access. The internal cladding support was all done by hand, accurate setting out of beveled columns gave a suitable platform to fix the substructure at awkward angles and positions as per the Architect’s design. The main Atrium roof is very high, and tower cranes were relied on for erection, difficulties were accessed and space as well as supporting lattice columns until the trusses were fixed in place.

What is special/ unusual/ innovative/ aesthetic about the steelwork/cladding in this project?

The final steelwork visual was not part of the architectural intent, therefore hiding it as effectively as possible while forming part of multiple systems and serving its purpose. To accommodate this architecture, it resulted in large unbraced lengths and a peculiar arrangement of members. There was also a large emphasis on keeping the tonnage down to accommodate the Green Star rating.

How did the project team work together (e.g Contractor involved early, challenges/ease of communication etc.)?

Design stage:   The Engineer and Architect liaised and correlated intent and final design with BIM level two, this was vital to ensure clash detection as the complex facade shapes where hard to interpret on two-dimensional drawings.

Shop drawing stage:  Even though detailed sheets were prepared, it was almost completely unused at this stage. Since such a large emphasis was placed on BIM, the model was an accurate reflection of the drawings. This allowed the Structural Steel Detailers to use the engineering model and import it straight into Tekla Structures software. Member lengths, connections, and positions translated from the model kept turnaround times for shop drawings and queries to a minimum. It also resulted in industry standard repercussions, where certain information pertaining to the length of the member can be omitted from engineering drawings and can technically only be used for design intent and setting out purposes.

Erection stage:  The Engineer worked directly with the Sub-Contractor to ensure the complexity of the information was carried over to the final item. BIM was also used on site, as the model was issued directly to the Sub-Contractor, allowing them to interrogate the model on site.

Tons of structural steel used 115 Tons
Structural profiles used All readily available profiles

Project Team

Project Team Role Company
Nominator KRU Detailing CC
Client/ Developer Redefine
Architect Paragon Group
Structural Steel Detailer KRU Detailing CC
Structural Engineer Sutherland
Engineer Sutherland
Quantity Surveyor MLC
Project Manager WBHO
Main Contractor WBHO
Steelwork Contractor Central Welding Works
Steel Erector Central Welding Works
Cladding Manufacturer Façade Solutions
Cladding Supplier Façade Solutions
Cladding Contractor Façade Solutions

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.

Our Lady of Lourdes – Rivonia Church

What is the purpose of the structure/project?

A new Roman Catholic Church with exceptional acoustics, despite the exterior weather conditions.

What was the brief to the Architect?

The brief to the project team was to design a long span octagonal roof, acoustically insulated from rain and hail sound effects.  The brief included the design of a complex shaped and vaulted ceiling below, also designed with specific acoustic properties.  A specialist Acoustic Consultant was employed  to assist in the form and specification of the roof coverings as well as ceiling below.  A Sound Reinforcement Consultant also advised on the church space and acoustic ceiling above.

Was the project envisaged in steel from the start? If not – why was it built in steel in the end?

Yes.  Early design options for a tiled roof were discounted at the inception of the project.

Give a brief description of the structural framing. What type of sections were used (e.g. hollow, cellular, I-beam, etc.) and why?

The roof design was made more complicated by the planned shape of the building itself, not being asymmetrical octagon but rather an adjusted one. This design could not rely on pure symmetry and a lot of effort was spent with the Structural Steel Detailers, KRU Detailing, to draw and detail all the components.

The fact that the springing point of the roof was at 6.95m above the slab level, and that the concrete work at roof level comprised of two complex rings of reinforced concrete “loops” supported on linked column frames, required planned tolerance between the steel/concrete face and much survey effort was undertaken by the builder and Sub-Contractors to ensure a first time fit at the high level.

The ceiling below was also required to be supported on a secondary structural steel grid.  The centroid and shape of the ceiling profile did not match the shape of the roof, with slopes and acoustic performance requiring support work, positioning the steel grid well away from trusses and cladding supports, considerably over-complicating the design and erection process.

Give a brief description of the cladding process (complexity, difficulty, innovation etc).

The roof cladding, on the advice of a multidisciplinary team led by the Engineer, was for lightweight concealed fix roof cladding, designed around the partly asymmetrical octagonal roof, built tightly over a special taped gypsum sandwich layer, specified by the Acoustic Consultant, the sound damping system was to be tightly below the metal cladding.

This design was configured to damp excessive noise from rain and hail during the future church services.  The gypsum was in turn supported on its own metal gridwork, all fixed to the steel roof at the highest level.  Spans and spacings were critical, with the roof cladding requiring a different support work spacing from the gypsum layers below.

The acoustic ceiling below was designed to a complex shape, in turn requiring a different grid configuration and shape from the girders and supports above.

The ceiling required movement and control joints as part of the design specification, with the metal grid work between steelwork and the acoustic ceiling itself being “weakened” at the critical positions of the larger radial joints to ensure the performance of the actual ceiling joints below.  The ceiling would not be readily accessible from below for cleaning and maintenance purposes due to the configuration and layout of the seating for the congregation.

Were there any challenges in the fabrication of the project from the Engineer’s design – if yes, please tell? Tell more about fabrication and erection process if it was complex, difficult, innovative etc.

The sheer complexity of the roof, the two independent levels of structure (at cladding level and much lower down at acoustic ceiling level), the substantially different shapes of the two structural elements, the moderately long spans, structural heights, moderate-high loads, and all design complicated matters.

The site of the new Church has a severe grade of around some eight percent, also had planned stepped terraces.  This required quite complex construction arrangements, affecting the delivery of materials, site storage and the steelwork erection process itself.

What is special/ unusual/ innovative/ aesthetic about the steelwork/cladding in this project?

The roof cladding itself required to reflect the “look” of old weathered copper-roofed churches, and the complex vaulted and shaped acoustic ceiling below were conceived by a specialist experienced ecclesiastical Architect and executed by the project team, led by the Structural Engineer.

A specialist Acoustic Engineer was consulted to assist with shape and material of the roof cladding as well as the ceiling below.  The requirement for special acoustic cladding at roof level, with the unique acoustic shape and material at ceiling level below, provided quite a challenge that was successfully solved by the Designers and Contractors.

The rainwater goods and concealed downpipe pipes required intricate detailing and planning.  The gutters were designed as part of the external cladding shapes and the collection and vertical reticulation of stormwater integrated into the frame and cladding of the building.  The downpipes are hidden in the structural support columns but linked back to the gutters, which in turn, were provided with long life urethane coatings.  An overflow capability was built into the gutter design to cope with larger design storms and hail precipitation.

How did the project team work together (e.g Contractor involved early, challenges/ease of communication etc.)?

The Contractor was consulted immediately after tender.  The tender documents were especially drawn up by the Quantity Surveyor firm, Norval Wentzel Steinberg, around the complex shape, and working drawings were included in the documents (for the upper-level structures only – the ceiling supports were added post tender). A pre-tender qualification process ensured a trim tender pack of experienced steel contractors.

Prior to award of the contract, the Sub-Contractor, Central Welding Works, and their project team was interviewed about the project, complexities, ceiling support grid, and the tight programme.  The Engineer had prior significant experience of contracting work from Central Welding Works and this was a material condition of the award itself.

Close planning between the Engineers and Structural Steel Detailers, resulting in several important meetings, and then the presence of an impressive three-dimensional (3D) drawing back to the team (Employer, Architects, and Contractors), ensured a multilevel approval process, all done quickly due to a rapid and compact construction programme.

The team realized the complex and special requirements of the roof upfront and the need to get it right from all angles and stages, from start to finish.  The shaped vaulted acoustic roof and complicated ceiling elements are probably the most crucial part of a successful building and all aspects of this received priority attention from the whole team, including the Employer, Structural Steel Detailer, and Site Crews.

Tons of structural steel used  32 Tons
Structural profiles used All Sections
Cladding profile/ type used 0.58mm colored GRS Kliplok 700 concealed fix
Cladding area/ coverage and tonnage 1,120m²

Project Team

Project Team Role Company
Nominator KRU Detailing CC
Client/ Developer Rivonia Catholic Church

The Shopz Group

Architect AIB Architects
Structural Steel Detailer KRU Detailing CC
Structural Engineer Rouillard Consulting
Engineer Rouillard Consulting
Quantity Surveyor Norval Wenzel Steinberg
Project Manager Rouillard Consulting
Main Contractor Interbau
Steelwork Contractor Central Welding Works
Steel Erector Central Welding Works
Cladding Manufacturer Global Roofing Solutions
Cladding Supplier Tate & Nicholson
Cladding Contractor Tate & Nicholson
Corrosion Protection
Paintwork Contractor
Dram industrial painters

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.

Rissik Street Post Office

What is the purpose of the structure/ project?

The structural steel is intended to act as a supporting frame of the existing building as it was previously damaged by fire in 2009.

What was the brief to the architect?

To restore the post office landmark to its former glory.

Was the project envisaged in steel from the start? If not – why was it built in steel in the end?

Yes as this was the most effective way of achieving the desired support within the existing structure.

Give a brief description of the structural framing. What type of sections were used (e.g. hollow, cellular, I beams etc) and why?

305*305*97 UC was used for the supporting columns that tied into the existing brickwork. Channels and angles made up the girders that support the floors in the upper levels of the building.

Were there any challenges in the fabrication of the project from the engineer’s design – if yes, please tell? Tell more about fabrication and erection process if it was complex, difficult, innovative etc.

The greatest challenge on this project was the allowed space to conduct the works in a safe and secure manner. As this was a restoration project great care had to be taken in the erection of the structural steel as these were to create support for the entire structure. Each of the structural members had to be measured on site to allow for precision fabrication further to the installation each section had to be monitored due to the damage caused by the fire in 2009 – special care had to be taken with the installation of the steel members and the connections to ensure sufficient and strong support. 

What is special/ unusual/ innovative/ aesthetic about the steelwork/cladding

in this project?

The post office was constructed in 1897 and has survived several disasters over the years, implementing the structural steel as a support structure within the existing building allows for the building to be structurally sound and prevents previous damage from compromising the integrity further. 

How did the project team work together (e.g contractor involved early, challenges/ ease of communication etc.)

All parties from start to finish worked in an orderly and disciplined manner allowing each trade to follow the other. Also allowing for multiple trades to conduct works simultaneously within a confined space.

Tons of structural steel used 130 TONS
Structural profiles used UB, UC, ANGLES

Project Team

Project Team Role Company
Nominator MPW STEEL CONSTRUCTION
Client/ Developer CITY OF JOHANNESBURG
Architect PARADIGN ARCHITECTS
Structural Engineer ASAKHENI CONSULTING ENGINEERS
Engineer Not provided by nominator
Quantity Surveyor Not provided by nominator
Project Manager Not provided by nominator
Main Contractor INKANYELI
Steelwork Contractor MPW STEEL CONSTRUCTION
Steel Erector MPW STEEL CONSTRUCTION
Cladding Manufacturer Not provided by nominator
Cladding Supplier Not provided by nominator
Cladding Contractor Not provided by nominator
Corrosion Protection
Galvanising
Not provided by nominator
Corrosion Protection
Paintwork Contractor
Not provided by nominator
Photographer, Photo competition MPW STEEL CONSTRUCTION
Photographer, Other submitted images Not provided by nominator

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.

RCL Foods Head Office, Westville

This project was undertaken in the framework of an extraordinary collaboration of the developer/landlord/contractor, tenant, architect, interior designer, branding alchemist and technical team. Somewhat of a ‘rescue operation’, we engaged by the developer to redesign a new corporate head office for RCL Foods after construction had commenced on the site in Westway Office Park. With a semi basement parking structure well underway for a generic commercial office block designed by another architect, the tenant decided that a bespoke design solution was imperative and the project entirely changed course. Key to advancing the conceptual approach for the workplace was an appreciation that the building was to be a pivotal part of creating a new culture for an amalgamated business of five individual corporate acquisitions. Driven by a desire to create Africa’s best and largest food company in the future, the directors of RCL Foods commenced weaving a non-corporate culture around the principles that people are the business and that the workplace environment should attract and retain the best human resource talent available. Working with the branding alchemist and the tenant engagement of our interior design company from the inception of the design proved to be an excellent decision as the stage was set for a fully integrated concept origination.

PROGRAMME

The new offices required to accommodate 700 people with an emphatic directive to create a bespoke environment exuding the culture of the business at every possible level. With growth and space planning flexibility demands being central to the physical programme, the need for a multiplicity of different meeting and collaborative spaces and a focus on food were imperatives. A desire for spatially connected workspaces with emphasis on providing a focal and legible public interface was expressed together with the need to create a variety of functionally usable external spaces.

APPLICATION + USE OF STEEL

The concept of the building delivers a significant linear atrium connecting all spaces and operations of the office building. This space is entirely given over to circulation, spatial connectivity and acts as the heart of the building. The application of steel, envisaged from inception, is expressly utilized in many primary and secondary components in the atrium space and is intended to be on show as the ‘theatrical’ material.

STEELWORK

CONNECTING ELEMENTS

The functional and visual focus of the atrium is the cascading staircase which extends from the entrance area to the uppermost floor and connects all levels. This is created from a single 450mm diameter tubular section which almost impossibly spans up to 13m between bridges which connect the floors on either side of the atrium. This stair displays cantilevered treads and is carefully crafted to connect to the bridges comprising universal beams and other sections to produce visually light elements in the space.

SECONDARY ELEMENTS

Steel is deployed variously through the building internally to produce an architecturally dynamic environment. Its sometimes subtle presence, is almost unperceived and this amplifies its extraordinary role in this building as both a ‘star actor’ and ‘cameo parts’!  The extensive balustrading is a composite of delicate perforated steel plate and both steel and stainless steel sections. This delivers a lightness and transparency which is rarely evidenced in such components. The exposed lifts in yellow lift shafts exhibit the workings of a standard lift and this displays the importance of steel components in a lift. The flush glazed atrium enclosure is neatly supported in slender universal beam sections set unconventionally to accommodate blinds.

SPECIAL INTERIOR APPLICATIONS

In an office which is unusual in nearly every way, all internal space divisions are unconventional.  Curvilinear glazed meeting pods, which precariously cantilever into the atrium, rely on curved steel tubular sections to support internal roofs and glazing, delivering a light and delicate support system. All internal meeting spaces and cellular office are created of freestanding steel framed structures where light tubular sections are deployed to support walls, glass and ceilings in many cases. Steelwork is seldom hidden and consistently treated in a dark charcoal colour, it demands both visual appreciation and indeed in its main roles, a ‘take your breath away’ awareness.

EXTERNAL APPLICATIONS

While RCL Foods is a fundamentally conventional wet-trades construction externally, many solutions to create the architectural outcome demand the use of steel. Hidden steel posts embedded in glazed enclosure, substructures for the signature perforated aluminium solar screens and giant tubular supports for impossible concrete cantilevers offer subtle and functional solutions through the building. Sporadic application of Corten is evident to selected and focal elements externally in the curved planters, gates and deck seating screens. This delivers a warm and crafted quality contrasting the cool grey and white exterior fabric.

CHALLENGES + TEAMWORK

This was a fast track project where the office building component was designed on a parking podium already under construction. So while the primary structure was being erected, decisions around methodologies to facilitate a near impossible completion date had to be made. Within the framework of a relatively conventional construction solution, the atrium usefully served as the concourse of construction. To allow efficient construction to proceed, the atrium roof demanded a soft roof using steel beams and lightweight sheeting as opposed to reinforced concrete. This decision, eliminating a forest of scaffolding then allowed the challenge of erecting a 70m long stair and series of connecting bridges to become manageable. Consistent and intense collaboration between Engineer, Architect, Interior Designer and Steel Fabricator became the hallmark of the design and construction process. Early involvement of the Contractor, Fabricator and Structural Engineer with significantly detail concept design at initial stages ultimately delivered a timeous and a remarkable outcome.

Tons of structural steel used      255 +

Structural profiles used Tubular and U.B.

Project Team

Project Team Role Company
Nominator EPA
Client/ Developer JT Ross
Architect EPA
Structural Engineer BPH Engineers
Engineer Not provided by nominator
Quantity Surveyor MLC Quantity Surveyors
Project Manager Not provided by nominator
Main Contractor JT Ross
Steelwork Contractor Rebcon Engineering
Steel Erector Rebcon Engineering
Cladding Manufacturer HB Interiors

 

Cladding Supplier HB Interiors
Cladding Contractor HB Interiors
Corrosion Protection
Galvanising
Not provided by nominator
Corrosion Protection
Paintwork Contractor
Not provided by nominator
Photographer, Photo competition Not provided by nominator
Photographer, Other submitted images Not provided by nominator

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.

Radisson Hotel at Silo 6

The Radisson Red hotel located in Silo 6 has art, music and fashion at its core. It is an upmarket hotel that caters to business travellers, international travellers and families. This 252-room Hotel, recently completed, is the first in South Africa of a new offering by the Radisson Group. The vibrant 4-star brand, Radisson Red, caters for a younger, trendier segment of the tourist market.

Situated immediately adjacent to the precinct’s Centrepiece, MOCAA (museum of Contemporary African Art), this project occupies a critical position. With MOCAA as the focus, and the existing BOE building on the opposite side, Silo 6 was designed to complement this composition of three buildings.

Conceptually, the building is a ‘wall’ building that defines the outer edge of the precinct and in mirroring the scale of the BOE building, showcases MOCAA as the focal point. Architecturally, the wall concept is expressed literally through the creative use of rendered brick construction on the East and West facades while the North and South facades reflect the Dockland’s industrial heritage using Steel and Glass.

The punctured fenestration on the East and West facades reflects the rational floor layout of rooms and is expressed using a custom designed protruding Aluminium frame. Juxtaposed against the rough brickwork, this device is a key contemporary insertion in the architectural expression of the building. The building has been awarded a 5-star Green Building status.

The project site had an existing super basement that was designed to accommodate a generic building on top of it. During the time when the basement was constructed, the client (V&A Waterfront) wasn’t 100% sure whether the building would be a hotel. The Rezidor Hotel Group/ Raddison Red later become the operator of the Radisson Red Hotel at Silo 6.

The Radisson Group has their own design requirements for creating a hotel and the brief to the architects was to adhere to their standards and to create a hotel that would maximise the number of rooms as well as fit into the Silo District, which has become a landmark in South Africa’s Mother City.

To create a commercially viable hotel, stay within the brand standards and requirements, and maximise keys of the third Radisson Red hotel in the world, the design team had to think out of the box. Not only did they have to respond to an existing structural grid that didn’t relate to a hotel configuration, but they also had to carefully consider how the north façade of the hotel would complement the Silo 6 district.

The structural gymnastics that the team employed included introducing V-columns to create a layout that would accommodate a hotel, and the north façade of the hotel included interesting steel solutions and careful placement of cladding pannels to create a playful ‘random’ rhythm within the framework.

There is a concrete frame structure with steel elements clipped onto the façade. The north façade is articulated with balustrading and channels that are fixed to the concrete structure with steel. The façade articulation speaks to the notion of an industrial area, which is appropriate for the context of the Silo 6 precinct which includes a working shipyard, a museum and other landmark buildings.

 The design team fixed vertical flat plates to the concrete frame structure in a series of angles to frame the balustrade modules. The beta fence panels (fencing panels) were then fixed to tubular sections. The concrete slab was then finished a C-channel that is fixed to the concrete edges, which created a unique and beautiful façade articulation. Red cladded panels create privacy for guests on their balcony. Bright red was an aesthetically pleasing way to introduce colour into the north façade while speaking to the operator’s brand, and created a seemingly random pattern on the façade.

One of the challenges that the design team encountered was a manufacturing error that led to an incorrectly sized balustrade height. The calculation error led to the design team having to adjust the design to avoid remanufacturing of the balustrade modular panels.

 The architects inherited a restrictive structural grid which informed a very constrained north suite façade configuration and the design team was tasked with articulating the north façade to create a playful ‘random’ rhythm in the framework. The balcony spaces vary in size due to the staggering of the red panels, which creates a beautiful façade.

 The challenge of the manufacture height was successfully overcome by the design team and the contractor working hand in hand to deliver the project on time and within budget. The team were able to collaborate to look at ways to achieve the desired results by modifying the fixing detail.

Cladding profile/ type used Klip-Tite & IBR
Cladding area/ coverage 270m2
Cladding tonnage 1,4 tons

Project Team

Project Team Role Company
Nominator Global Roofing Solutions
Client/ Developer Not provided by nominator
Architect Peerutin + Design Space Africa
Structural Engineer Arup South Africa
Engineer Not provided by nominator
Quantity Surveyor MLC Cape Town
Project Manager Not provided by nominator
Main Contractor Not provided by nominator
Steelwork Contractor Not provided by nominator
Steel Erector Not provided by nominator
Cladding Manufacturer Global Roofing Solutions
Cladding Supplier Global Roofing Solutions
Cladding Contractor Chartwell Roofing
Corrosion Protection
Galvanising
Not provided by nominator
Corrosion Protection
Paintwork Contractor
Not provided by nominator
Photographer, Photo competition Not provided by nominator
Photographer, Other submitted images Not provided by nominator

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PwC Tower – Triple Height Lobby

PwC Tower is PwC’s new head office in Johannesburg. The floor plates of the 28-storey building rotate by 1.2 degrees per floor, which results in a doubly-curved surface for the building’s façade and the structural line behind. The reception is housed in a triple volume lobby area at ground floor. This triple volume space flows into the adjacent meeting centre, and is used as a café and informal meeting space.

A steel and glass atrium roof covers the link between the tower and the meeting centre, whilst a steel link bridge with glazed balustrades connects the two floors at first floor level with a steel feature stair forming the principal link up to the second floor of the meeting centre. Whilst the majority of the tower floors are post-tensioned concrete, the first and second floors of the tower are formed in steelwork with bondek slabs and are hung from the third floor, to increase the column-free space in the lobby below. The northern part of the lobby features a triple volume steel and glass façade, gently following the twist of the tower. Within the atrium and outside the glass façade the sloping and spiralling columns of the building are encased in steel tubes to act compositely with the concrete inside; this increases the capacity of the reinforced concrete columns where they are unrestrained over the three floors and means that the overall section sizes can be similar to the rest of the tower which allows us to achieve the preferred architectural aesthetic. All of these components feature the use of steelwork in a complex geometric form and in the majority of cases the painted steel is exposed to form the finished surface.

Rectangular hollow sections were used on the skylight. The suspended floors were built out of BOND-DEK on cellular beams, with curved edge beams rolled horizontally. The hangers are circular hollow profiles. The bridge and stair are predominantly formed from welded plate with concealed connections and preformed slots for the cantilevered glazed balustrades. The façade mullions, spanning over three floors are I-sections, and are laterally restrained by circular hollow profiles. Rolled square hollow profiles are used over the main entrance doors. The structural columns in the tower are encased in large diameter circular hollow tubes.

The geometry of all this steelwork was generated by parametric scripts. The steel profiles were explicitly modelled in 3D by the design team. Conventional plans with all setting out information were produced for use on site but the 3D steelwork model was also issued to the contractor to use as the basis of their steel shop model and then later used to check the steel shop model.

Tons of structural steel used 250t
Structural profiles used RHS, CHS, UB, UC and plates

Project Team

Project Team Role Company
Nominator Arup
Client Attacq
Developer Atterbury
Architect LYT Architecture
Structural Engineer Arup
Quantity Surveyor Brian Heineberg & Associates
Main Contractor WBHO
Steelwork Contractor Cadcon
Steel Erector Cadcon
Cladding Manufacturer Geustyn & Horak (G&H Aluminium)
Cladding Supplier Geustyn & Horak (G&H Aluminium)
Cladding Contractor Geustyn & Horak (G&H Aluminium)

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Pre Eminence Studio

What is the purpose of the structure/ project?

New head office for Raamgoolan and associates

Was the project envisaged in steel from the start? If not – why was it built in steel in the end?

Yes, Architect had previously worked with Futurecon and wanted this building to be Light Steel Frame

Give a brief description of the structural framing. What type of sections were used (e.g. hollow, cellular, I beams etc) and why?

Light Steel Frame for thermal efficiency and speed

Give a brief description of the Light Steel Frame Building element of the project. (Notable features/ achievements made possible by LSFB)

Light steel Frame was used for all external walls, some internal walls and roof trusses

Were there any challenges in the fabrication of the project from the engineer’s design – if yes, please tell? Tell more about fabrication and erection process if it was complex, difficult, innovative etc.

Trusses, spans used without plating.

What is special/ unusual/ innovative/ aesthetic about the steelwork/ cladding in this project?

Remote location, LSF assembled onsite

How did the project team work together (e.g contractor involved early, challenges/ ease of communication etc.)

Futurecon was involved from the beginning and given 3 months to complete entire structure.

Project Team

Project Team Role Company
Nominator Futurecon
Client/ Developer Ramgoolam and Associates
Architect Osmond Lange Architects and Planners
Structural Engineer EMC Engineering
Steelwork Contractor Futurecon
Steel Erector Futurecon
Cladding Manufacturer Futurecon
Cladding Supplier Futurecon
Cladding Contractor Futurecon
Photographer, Photo competition Futurecon

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Pepkor Warehouse

The purpose of the Pepkor Warehouse in Hammarsdale is to serve as a distribution centre for the Pepkor group. The distribution centre consists of the following aspects:

  • Total of 80 000m2 of covered warehouse space (180m wide and 440m long).
  • Main Ackermans office and a main Speciality office with 3000m2 and 1800m2 respectively.
  • A total of 4 node offices of 500m2 each.

The brief to the architect and the team for the structural portion of the project was the following:

  • Warehouse to be ±55,000m² for Ackermans and ±25,000m² for Pepkor Speciality in one building as per the Layout Plan.
  • Approximately 17.35m clear height to underside of eaves.
  • Reinforced concrete and structural steel all to Structural Engineer’s design incorporating appropriate corrosion protection where necessary.
  • Internal column spacing will based on a 33.2m x 30.5m grid (4 doors @ 8.3m centres = 33.2m).
  • The structure steel will be strengthened locally to allow for the installation of solar panels to a roof area of approximately 15,000m².

The warehouse was always envisaged to be constructed mainly out of structural steel. The main support columns of the warehouse were designed and constructed out of concrete up to 12.6m and 17m from FFL. The remainder of the structure was constructed out of structural steel.

The structural system used for the building was based on a girder truss system carrying lateral trusses that makes up the main elements of the roof. Various steel profiles were used for the building from hot rolled I-Beams, Angle irons, Circular hollow sections, cold rolled lipped channels and so forth.

The remarkable aspects of this project were the speed at which the steelwork was erected as well as the completion of the overall project. A total of 2500 ton of structural steel was erected (Main warehouse 2180 tons and canopies / offices 320 tons = 2 500 tons), with the erection commencing on 14 November 2017, and reaching completion of the main warehouse structure (2180 Ton) at the end of March 2017 (which includes a builder’s break). This remarkable achievement was achieved over a period of 90 working days to erect on average of 24 tons per day over a period of 4,5 months, using on average 8 cranes on site over the same period.

A sensitive construction program had the steel contractor under pressure from 19 August 2016 which was the date of appointment. Cadcon Steel Construction decided to enter in a joint venture with A. Leita Steel construction to reach the delivery various dates for erection. The on-site production required to meet the construction program resulted in an average of 485 ton of structural steelwork to be erected per month.

The entire project team worked together successfully throughout the entire duration of the project. Effort was made to design the structure in a manner that suits the various contractors involved at each step of the project to reach the various project milestones.

Tons of structural steel used 2 500 tons
Structural profiles used Hot rolled I-, H-, Angle section, Cold Rolled Lipped channels

Project Team

Project Team Role Company
Nominator EDS Engineering Design Services (Pty) Ltd
Client/ Developer Rokwil Property Development
Architect T C Design Architects
Structural Engineer EDS Engineering Design Services (Pty) Ltd
Engineer Not provided by nominator
Quantity Surveyor MHS Consulting Quantity Surveyors
Project Manager Dave Armstrong
Main Contractor Abbeydale Building and Civils (Pty) Ltd
Steelwork Contractor Cadcon Steel Construction and Engineering
Steel Erector Fanie Leibrandt Steel Erectors
Cladding Manufacturer Macsteel Service Centres (Pty) Ltd
Cladding Supplier Macsteel Service Centres and Engineering (Pty) Ltd
Cladding Contractor Impact Engineering (Pty) Ltd
Corrosion Protection
Galvanising
Dram Industrial Coating
Corrosion Protection
Paintwork Contractor
Not provided by nominator
Photographer, Photo competition Abbeydale Building and Civils (Pty) Ltd
Photographer, Other submitted images  

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.