Radius Arch Structure Design

Permanent Applications


Radius Arch Structures as Permanent Roofing Solutions


Permanent Roofing Applications


Radius Arch Roofing Structures have been used in a wide range of permanent and semi-permanent roofing structure applications. Their light weight, corrosion resistance, easy erection and durability have seem them being adapted for use in a wide variety of roof structure functions.




The Radius arch makes use of the award winning 'Amplibeam' as the main structural member. The Alb 200, ALB 365 and ALB 475 are used in the arch and the ALB 200 is used as a purloin. This enables us to economically span from 10m to 45m over land and up to 35m over a swimming pool.


The structures are designed to comply with SABS building codes and AFSA aluminium design codes.


We have erected buildings in numerous places around the world without any problems. Our simple erection methods ensure heavy lifting equipment is not required and the materials ensure a long and maintenance free life span.


Amplibeam structural properties are available at www.ampliform.co.za/amplibeam


Popular Uses


Aircraft Hangars

Swimming Pool Enclosures

Bulk Storage & Industrial Facilities

Halls- Community & Religious


The radius arch is available in a variety of cross=sections. These have been broken down into 3 segments based on the arch segment member. PDF files of the available sizes may be downloaded below.


Roof Sections 1 - 6m, 8m & 10m wide FREE SPAN x 3m bay spacing's.


Roof Sections 2 - 11.5m, 15.5m & 19.5m wide FREE SPAN x 4m bay spacing's.


Roof Sections 3 - 20m, 25m, 30m & 35m wide FREE SPAN x 5m bay spacing's.


We are able to span to 45m wide FREE SPAN over a ground area and reduced arch spacing's.


The sizes given are standard sizes but in-between sizes can be manufactured on request.


Structural designs are available for each size and Structural Certificates will be supplied with each purchase.




We are able to fix a wide range of roof sheeting onto the structures and therefore the roof sheet finish may be specified to suit your requirements. The most popular and therefore our standard sheet products are polycarbonate, aluminium and zinc alume.


A wide range of products are available in these 3 standards and the one best suited to your application will be considered.


Sheeting is placed over the structure to eave height on the sides and upper gables as a standard. This may be changed at your request. A combination of sheeting types is also acceptable.


Flexible PVC roof sheeting may also be used. This makes the structure less permanent but decreases erection time.





There is a wide variety of finishes that may be applied to the sides. Either Alifab or an outside contractor can complete the enclosing of the roofing structure. The sides may be finished to suit your requirements.


The options available include:

- Brick work

Sheet cladding

Aluminium and glass

PVC fabrics



We can supply any of these directly or through sub-contractors. You are also welcome to engage your own sub-contractor.