Purlin load span tables. Load tables provide unfactored gravity load capacities which are based on the lesser of the purlin working load capacity or as controlled by a deflection limit of Span/180. 6 purlin bolts. With rigorous analysis it is possible to construct to the same size purlins throughout but with the two end spans being 20% reduced in length. May 9, 2011 · Capacities listed in the “Unbraced” column are the allowable load for cases where no lateral bracing of any type is present for either fl ange for the full span length. Design Principle for Purlin Selection Table The Prulin Selection Table are complied to BS 5950 : PART 5 : 1998 - Code of Practice for design of cold formed thin gauge sections A) DESIGN LOADING Sleeved Purlin System Load Table The load tables are the result of extensive design and testing using the facilities and skills of the Department of Mechanical Engineering at The University of Strathclyde. Load Table Technical Details For Our Full Range Of Purlins Systems. BCSA Limited is the national organisation for the Steel Construction Industry; its Member companies undertake the design, fabrication and erection of steelwork for all forms of construction in building and civil engineering. Alternatively the SkyCiv Purlin Spacing Calculator can be used to calculate z and c purlin span. The 300 and 350mm . Limit state tables are listed for specific purlin combinations in order to afirm economic design solutions. 6. Flexospan CEES structural steel members. These span tables are the Quick Selection Table for Simple Span Purlins Note: Please refer design principle of above selection table before make selection. Purlin Load Table Notes Tabulated values are allowable superimposed loads (PLF) on normal 1/2:12 to 4:12 roof pitches. This brochure has been developed taking into consideration the trend towards more complex span configurations and varying end-uses of lightweight cold-formed sections, to give easier and more accurate access to design Purlin span tables are used to determine the maximum span of purlins based on the structure and design parameters. These purlins play a critical role in structural integrity by efficiently transferring roof loads—such as wind, snow, and dead loads—to 5 days ago · Load Capacity and Span Length: Ensure the purlin can safely support roof panels, insulation, and environmental loads like snow or wind. Click on a span to generate a full calculation (you can adjust the exact span and slope). Feb 18, 2026 · Engineering software or span tables should be used to match purlin size to span and load Pro tip: Consult structural design guidelines or a professional engineer for non-standard roof configurations. The tables also provide ultimate load capacities for gravity load, wind uplift and for deflection limits of Span/180 and Span/150. Weight of roofing material and other dead loads must be subtracted from tabulated values of purlins to determine net live load capabilities. 6) Imposed loads of 0. Purlin weights have not been subtracted from them. Cleat Connections and Bolt Specifications The capacity tables are for C or Z purlins fastened through the webs to cleats so that the load path is via the webs of the purlins. Building Type: Warehouse, industrial, and commercial buildings have different structural requirements. Corporate Members are clients Feb 21, 2026 · Types of FRP Purlins in Building Construction A FRP (Fiberglass-Reinforced Plastic) purlin is a lightweight yet high-strength structural component used primarily in roofing and wall cladding systems for industrial, agricultural, and commercial buildings. Steel Purlins Span Tables. INTRODUCTION HST Steel Purlins & Girts are high-strength lipped profile sections manufactured by Steel & Tube, incorporating optimised enhancements to the traditional Cee shape. Associate Members are those principal companies involved in the direct supply to all or some Members of components, materials or products. Performance The performance of the systems shown in this document has been derived by calculation in accordance with BS EN1993-1-3: 2006, calibrated and proven by full scale tests. Cleats are available with 2 or 4 holes for bolting the sections to. On the other hand, purlin load tables are used to determine the maximum load a purlin can support. Angle struts should be used to restrain against uplift. This span table is to the format and methodology given in BS 5268-7. In special projects, the following elements can be adjusted to opimise design: material specifications, bolt quantity, bolt specifications, bridging quanity, span range, lap length, end span sizes, cantilevers, and loading requirements. The bolts specifications depend on the purlin size. In continuous construction, it is always the first span that controls hence the mixed gauge charts have been designed with stronger first span members as an option. Span Tables for Purlin Supporting Rafters (to BS 5268-7. Roof purlins and wall girts. These spans were calculated using our purlin calculation engine. Even-profile C purlins and C girts. The 150, 200 and 250mm purlins generally use standard M12, Grade 4. Contact Our Team On +44 (0)121 6016000. 75 kN/m² snow load are applicable to most areas where the altitude does not exceed 100 metres (refer to BS 6399-3) SINGLE SPAN PURLIN LOAD TABLES The loads shown (kN) are dependent on lateral restraint of the upper flange by suitable cladding. Find the column for your dead load and spacing, and the row for your timber size to find the permissible clear span on slope in metres. Weight of roofing material and other dead loads must be subtracted from tabulated values of purlins to determine net live load capabili es. Load Table Notes Tabulated values are allowable superimposed loads (PLF) on normal 1/2:12 to 4:12 roof pitches. rtx yqq eqn xaz ghj jca zln rfm ikq vgi pml thy yuh scm kff