Roof Purlin Z Purlin Span Table

Additionally z purlins can be nested together as a splice in roof construction.

Roof purlin z purlin span table.

Purlin load 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. Tables include simple continuous lapped and combination spans allowing a comprehensive range of spanning options. Lapped span design capacity tables including continuous are based on a 15 lap. Purlins and girts are manufactured from high tensile steel for increased strength and reduced weight.

This means that the final roof support system appears to be one unbroken purlin providing efficiency and durability. By the standard the most used placement of purlin span for metal roof is five foot intervals. Offering robustness and flexibility z purlins are a traditional yet effective system of sheet support that are easier to install and handle than traditional timber. Wind snow weight tables flexospan provides standard even profile z purlins and z girts as well as custom profiles and punching patterns.

C shaped wall girts may be used for framed openings and other special applications. Z450 is also available on request. Steel z purlins and z girts are also available with other depths and flange widths. Stramit generally recommends a lap length of 15 of the span.

Strong and lightweight our z purlins span upwards of 25 feet depending on the roof load and how spaced out the z purlins are. For 2x4s purlins the posts are spaced in 4 feet distance. Z and c members are shop punched for simple field bolted connections. Coating mass of z350 provides long life under normal circumstances.

We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge. For 2x6s purlins the posts are spaced in 6 feet distance. Where span lengths are unequal eg reduced end spans each purlin should have 7 5 of each adjacent span added as the lap length on that spans side of the support. If the space between posts is greater than 8 feet then brace is needed to avoid buckling.

Z and c members are available in 8 10 or 12 inch depths. The tables also provide ultimate load capacities for gravity load wind uplift and for deflection limits of span 180 and span 150. Standard secondary framing consists of cold formed z shaped roof purlins and wall girts.