Coating mass of z350 provides long life under normal circumstances.
Roof purlin z purlin span table.
For 2x4s purlins the posts are spaced in 4 feet distance.
Strong and lightweight our z purlins span upwards of 25 feet depending on the roof load and how spaced out the z purlins are.
Standard secondary framing consists of cold formed z shaped roof purlins and wall girts.
Steel z purlins and z girts are also available with other depths and flange widths.
Additionally z purlins can be nested together as a splice in roof construction.
This means that the final roof support system appears to be one unbroken purlin providing efficiency and durability.
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.
Stramit generally recommends a lap length of 15 of the span.
Houston tx 77075 phone 713 946 7140 us wats 800 324 9992 purlin load tables simple span capacities.
Tables include simple continuous lapped and combination spans allowing a comprehensive range of spanning options.
For 2x6s purlins the posts are spaced in 6 feet distance.
Z and c members are shop punched for simple field bolted connections.
Purlins and girts are manufactured from high tensile steel for increased strength and reduced weight.
The tables also provide ultimate load capacities for gravity load wind uplift and for deflection limits of span 180 and span 150.
C shaped wall girts may be used for framed openings and other special applications.
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.
Wind snow weight tables flexospan provides standard even profile z purlins and z girts as well as custom profiles and punching patterns.
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.
Z and c members are available in 8 10 or 12 inch depths.
Lapped span design capacity tables including continuous are based on a 15 lap.
Z450 is also available on request.
If the space between posts is greater than 8 feet then brace is needed to avoid buckling.
By the standard the most used placement of purlin span for metal roof is five foot intervals.
