Long Span C Purlin Roof Design

Arrangement of purlins by default purlin sections assume the slope of the roof they are supporting.

Long span c purlin roof design.

Flange bent to suit the roof slope. The c sections can also form part of the columns and rafters in these smaller applications. High pressure zones kl 1 5 and 2 0 included. 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.

Purlins near roof edges or changes of roof slope are subject to higher wind forces than interior purlins. Provide a long and trouble free life for enclosed buildings. 20 95 30 d c a b variable angle 18 x 22 holes 34 x 10 recess upturned lip z sections. As per as1684 and as4055 spanman adopts a nett pressure coefficient applied along the full length of the purlin of cpn 2 0 for non cyclonic zones n1 to n6 and cpn 2 5 for cyclonic zones c1 to c4.

Spantec has prepared these tables for use by people skilled in the design and specification of the. Maximum roof slope is 5 for monoslope and 22 5 for pitched roof. The number of supports beams or purlins affects the allowable span length. The safe spans below are suitable for sheds and class 1 structures with the following assumptions.

Four or more equi spaced supports. Flexospan provides standard even profile c purlins and c girts as well as custom profiles and punching patterns. 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. Three equi spaced supports equal spans.

C purlin and c girt structural steel wind snow weight tables. Use recommended minimum roof pitches as specified by roof sheet supplier. Data is given in each table for. 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.

Meanwhile there are two kinds of purlin span for metal roof based on the shapes which are the c purlins and z purlins. Cpe 0 9 and cpi 0 2. C purlins and c girts. Max roof span allowed 12m.

2 what is. Flat roof span tables allow for a maximum roof pitch of 5º. We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge. Two supports one at each end double span.

Monoslope pitched single. Metroll purlin design guide capacity tables a met tech guide c z standard purlins july 2019.