The safe spans below are suitable for sheds and class 1 structures with the following assumptions.
Span c purlin roof design.
Double span heavy end bay similartoheavyendbay system butusingdouble spanninginteriorpurlin lengthsandfewersleeves.
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.
Safe roof purlins spans.
Flexospan provides standard even profile c purlins and c girts as well as custom profiles and punching patterns.
Where purlin spans are unequal between supports each purlin should have 6 25 of each adjacent span added not 6 25 of that purlin s span.
A traditional purlin strictly by definition is a horizontal structural member in a roof.
20 95 30 d c a b variable angle 18 x 22 holes 34 x 10 recess upturned lip z sections standard z the following diagrams and tables illustrate the sizes and thicknesses readily available for purlins and girts.
Cpe 0 9 and cpi 0 2.
C purlin and c girt structural steel wind snow weight tables.
High pressure zones kl 1 5 and 2 0 included.
Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc.
The c section can be supplied as a standard configuration or with the top flange bent to suit the roof slope.
Shapes other than standard c and z sections may be.
Design manual for purlin and cladding rail systems ay rshire met al pr oducts d av entr y limited ayrshiremetalproducts daventry ltd.
Purlin is a well known material in the field of architecture structural building or structural engineering.
Of a fascia purlin in fascia applications.
It is a horizontal bar that used to support building at the roof structurally.
In timber construction purlins are nailed to the rafter or supporting trusses while in steel roof construction they are welded or bolted to the rafters or trusses by the means of cleats.
The c section can be supplied as a standard configuration or with the top flange bent to suit the roof slope.
In the past the majority of roof structures were of wooden construction but over the past 15 to 20 years there has been.
Spantec has prepared these tables for use by people skilled in the design and specification of the.
20 95 30 d c a b variable angle 18 x 22 holes 34 x 10 recess upturned lip lead times and minimum order quantities may apply.
The c sections can also form part of the columns and rafters in these smaller applications.
As structural members they resist loads and provide lateral restraints for truss members therefore it is important to design them properly against forces such as bending shear torsion buckling etc.
Max roof span allowed 12m.
Flat roof span tables allow for a maximum roof pitch of 5ยบ.
Use a standard c section in place of a fascia purlin in fascia applications.
Check with your local metroll branch.
Design specification data section z or c thickness mm yield stress mpa mass kg m 75 95 0 95 550 1 26 75 12 1 2 500 1 59 75 15 1 5 450 1 97 100 10 1 0 550 1 77 100 12 1 2 500 2 10 100 15 1 5 450 2 61.
C purlins and c girts.
