Four structural systems are available, the sleeved system, double-span sleeved system, heavy end-bay system and the butted system. These allow for a flexible and efficient range of solutions to roofing supports for a wide variety of cladding types.

• Sleeved single-span system
This is the traditional system of single bay-length sections with sleeves at all penultimate supports and at alternative internal supports. The system may be used with all types of cladding and roof pitches.

• Sleeved double-span system
Sleeves are provided at all penultimate supports and are staggered at internal bays. The advantage is a reduced number of erection components when compared with the Sleeved System.

• Heavy end single-span system
This is a highly efficient sleeved-system, with sleeves at all supports thus allowing a form of continuous beam design.

• Heavy end-bay double-span system
Sleeves are provided at all penultimate supports and are staggered at internal bays. The advantage is a reduced number of erection components.

• Sleeved purlin system; single/double span lengths
This system may be used with restraining or non-restraining cladding, and may also be used to support tiled roof systems.

• Butted single-span system
The system is required for buildings of a single span length and is efficient for short spans or light loadings. Butted purlins are also useful for frames which have large clear spans and where large frame deflections may be harmful to continuous purlin systems.

• Butted purlin system
This system is useful for single-span conditions, either over-supports or flush with supports. The system is also economical for small bays or light loadings, where sleeves are not necessary.Steadmans purlins and rails are designed as a comprehensive range of traditional Zed-sections for supporting a wide range of roofing and cladding. This traditional and well-proven system offers a high degree of flexibility of erection together with structural efficiency.

The wide range of solutions available, combined with the simplicity of cleat details and complete compatibility between Zed and Cee section sizes, make Steadmans purlins and rails ideal for complicated roof designs.

Customer-designed Zed, Cee and eaves beam sections can be manufactured along with individual designs for special applications, and the companys extensive stock of full-width coils in various gauges and its capability to cut, fold and punch these materials, allow Steadman to offer solutions to almost all situations.

Steadmans cold roll products are formed from hot-dipped galvanised steel coil to BS EN 10326:2004 Fe E350G-Z275 and the sections are designed to BS 5950-5:1998 using a combination of rational analysis and component testing carried out at Strathclyde University, and are supported by full-scale in-house tests.

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