Experimental Investigation on Wide-Span Cold-Formed Steel Roof Truss System


Article Preview

The needs of environmental conservation and speed development in construction industry today have forced the search for better technologies in structural roof truss construction. Cold-formed section is a better choice for roof truss system in sustainable design with several advantages e.g. reduce cutting down of trees, speedy in construction, stronger, lighter and flexible in erection. However the stability issues occurred when wide-span roof truss is implemented with thin-walled cold-formed steel member. A full scale testing for a 25 meter wide-span roof truss system was carried out at Universiti Teknologi Malaysia to study the structural performance. The overall span of the truss is 25m in length with the height of 4.7m and the width of 1.2 m, built up by cold-formed steel channel sections of 150 mm and 74 mm in depth. Uniform loads were placed on the top and bottom chords of the truss using cement bags. The roof truss deformed at a total load of 63.77 kN or 52.7% of the designed load. Failure modes of the truss system were being observed and discussed for further improvement of the truss design.



Edited by:

Xingang Zhou, Mingjin Chu, Jinming Liu, Shuying Qu and Haitao Fan




S. Mohammad et al., "Experimental Investigation on Wide-Span Cold-Formed Steel Roof Truss System", Applied Mechanics and Materials, Vols. 166-169, pp. 1304-1307, 2012

Online since:

May 2012




[1] Olli Kaitila, Jyrki Kesti and Pentti Mäkeläinen. The behaviour of a new type of connection system for light-weight steel structures applied to roof trusses. Steel and Composite Structures, Vol. 1, No. 1, 17. (2001).

DOI: https://doi.org/10.12989/scs.2001.1.1.017

[2] M James V. Wood and John L. Dawe. Full-scale Test Behavior of Cold-formed Steel Roof Trusses. Journal of Structural Engineering Vol. 132, No 4, 616. (2006).

DOI: https://doi.org/10.1061/(asce)0733-9445(2006)132:4(616)

[3] John L. Dawe and James V. Wood. Small-scale Test Behaviour of Cold-formed Steel Roof Trusses. Journal of Structural Engineering Vol. 132, No 4, 608. (2006).

DOI: https://doi.org/10.1061/(asce)0733-9445(2006)132:4(608)

[4] M. M Tahir, S. Saad, A. L. Saleh, C. K. Tan. Full-scale Testing for Roof Truss System Using Cold-Formed Steel Sections. Korea: Technopress. (2004).

[5] Kemuning Structures Sdn. Bhd. K-Structures: Quality Solution in Steel Building System. Malaysia: Kemuning Structures Sdn. Bhd. (2007).

[6] British Standard Institution. Structural use of steelwork in building- Part 5. Code of practice for design of cold formed thin gauge sections. UK: BSI. (1998).

DOI: https://doi.org/10.3403/01578111

[7] British Standard Institution. BS 6399-1 Loading for buildings- Part 1: Code of practice for dead and imposed loads. UK: BSI. (1996).

[8] Steel Technology Centre. Full-scale Test on Kemuning Structures 25m Cold-formed Steel Roof Truss System. Technical Report. Malaysia: UTM. (2007).