Spantec has prepared these tables for use by people skilled in the design and specification of the.
Long span c purlin roof design.
Four or more equi spaced supports.
Maximum roof slope is 5 for monoslope and 22 5 for pitched roof.
2 what is.
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.
However some manufacturers sell designs to do up to 24 metres in span.
C purlin and c girt structural steel wind snow weight tables.
Provide a long and trouble free life for enclosed buildings.
The number of supports beams or purlins affects the allowable span length.
Metroll purlin design guide capacity tables a met tech guide c z standard purlins july 2019.
This post will be focusing on design of steel purlin using cold formed sections.
Data is given in each table for.
The spacing of purlins usually call for careful arrangement in the sense that it should follow the nodal pattern of the supporting trusses.
Flange bent to suit the roof slope.
20 95 30 d c a b variable angle 18 x 22 holes 34 x 10 recess upturned lip z sections.
Two supports one at each end double span.
Three equi spaced supports equal spans.
Use recommended minimum roof pitches as specified by roof sheet supplier.
Flexospan provides standard even profile c purlins and c girts as well as custom profiles and punching patterns.
C purlins and c girts.
To identify whether yours is the earlier or the latter type look for the end of the rails and check whether the shapes mimics the shape of letter c or letter z.
Meanwhile there are two kinds of purlin span for metal roof based on the shapes which are the c purlins and z purlins.
In general c purlins sheds are best for smaller spans.
However some manufacturers sell designs to do up to 24 metres in span.
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.
This is right at the limit of a purlin s capacity and does no leave much margin for coping with nasty weather conditions.
Monoslope pitched single.
Purlins near roof edges or changes of roof slope are subject to higher wind forces than interior purlins.
Flat roof span tables allow for a maximum roof pitch of 5ยบ.
