Posts these span tables are designed for a minimum post size of 50 x 50 x 2 5mm up to a maximum height of 3 0m.
Long span c purlin roof design.
For purlins calculate 1 2 inch of depth for every foot of span.
Spantec has prepared these tables for use by people skilled in the design and specification of the.
Max roof span allowed 12m.
High pressure zones kl 1 5 and 2 0 included.
This post will be focusing on design of steel purlin using cold formed sections.
Maximum roof slope is 5 for monoslope and 22 5 for pitched roof.
Cpe 0 9 and cpi 0 2.
Flat roof span tables allow for a maximum roof pitch of 5ยบ.
Two supports one at each end double span.
Safe roof purlins spans.
Data is given in each table for.
Flexospan provides standard even profile c purlins and c girts as well as custom profiles and punching patterns.
If a steel purlin must span 24 feet between girders it should be at least 12 deep for girders calculate 3 4 inch of depth for every foot of span.
Here is the formula for calculation of a roof purlin.
The spacing of purlins usually call for careful arrangement in the sense that it should follow the nodal pattern of the supporting trusses.
For 2x4s purlins the posts are spaced in 4 feet distance.
Tables are given for 5 or more spans.
If a steel girder must span 24 feet between columns it should be at least 18 deep.
These tables are for spans in which purlins are lapped over each support where the lap length is 15 of the span.
Four or more equi spaced supports.
For outwards loads on equal continuous spans the bridging shown is required in the end spans.
We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge.
Purlins rails eaves beams z e d p u r l i n s y s t e m s e a v e s be a m s z e d c e e s h e e t i n g r a i l s fl o o r c e e s design guide september 2014.
The c sections can also form part of the columns and rafters in these smaller applications.
Use recommended minimum roof pitches as specified by roof sheet supplier.
The standard of purlin length will vary anywhere between 100 to 300 mm while the thickness will vary anywhere between 1 to 3 mm.
Arrangement of purlins by default purlin sections assume the slope of the roof they are supporting.
Continuous purlin span are simply supported at each end and at a series of equally spaced intermediate supports.
The number of supports beams or purlins affects the allowable span length.
Cos of live load dead load x cos of the purlin spacing x purlin span squared 8 x sm section modulus of the member x duration of load 1 15 in areas with snowfall x cr repetitive member factor of 1 15 where members are 24 on center or less fb fiberstress required.
C purlins and c girts.
C purlin and c girt structural steel wind snow weight tables.
Monoslope pitched single.
