Span C Purlin Roof Design

C purlin and c girt structural steel wind snow weight tables.

Span c purlin roof design.

Flat roof span tables allow for a maximum roof pitch of 5º. Purlin is a well known material in the field of architecture structural building or structural engineering. 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. 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.

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. The c sections can also form part of the columns and rafters in these smaller applications. Double span heavy end bay similartoheavyendbay system butusingdouble spanninginteriorpurlin lengthsandfewersleeves. Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc.

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. In the past the majority of roof structures were of wooden construction but over the past 15 to 20 years there has been. There is an available purlin for every type of roofing material including purlin span for metal roof which is the most common material type to use this item. The safe spans below are suitable for sheds and class 1 structures with the following assumptions.

A traditional purlin strictly by definition is a horizontal structural member in a roof. Max roof span allowed 12m. C purlins and c girts. Cpe 0 9 and cpi 0 2.

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. Use a standard c section in place of a fascia purlin in fascia applications. Shapes other than standard c and z sections may be. 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. 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. Design manual for purlin and cladding rail systems ay rshire met al pr oducts d av entr y limited ayrshiremetalproducts daventry ltd. High pressure zones kl 1 5 and 2 0 included.

We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge. The c section can be supplied as a standard configuration or with the top flange bent to suit the roof slope. It is a horizontal bar that used to support building at the roof structurally. The c section can be supplied as a standard configuration or with the top flange bent to suit the roof slope.

Spantec has prepared these tables for use by people skilled in the design and specification of the. Of a fascia purlin in fascia applications.