As per generals rule and guideline, you need a 4- inch (100mm) purlin for 3m span, 6- inch (150mm) purlin for 4m & 5m span, 8- inch (200mm) purlin for 6m & 10- inch (250mm) purlin for 8m span which can safely transfer the load to trusses.

What size purlin do I need?

As per generals rule and guideline, you need a 4- inch (100mm) purlin for 3m span, 6- inch (150mm) purlin for 4m & 5m span, 8- inch (200mm) purlin for 6m & 10- inch (250mm) purlin for 8m span which can safely transfer the load to trusses.

How is purlin weight calculated?

WEIGHT (KGS ) = WIDTH X WIDTH X 0.00000785 X LENGTH. Example : A Square of size 25mm and length 1 metre then the weight shall be.

How far can you span with C purlin?

Normally a spacing of C purlin is around 900mm (0.9m), 1200mm (1.2m) and 1500mm (1.5m). This can be spaced 1.2 metres apart when using sheeting with a thickness of 0.7mm, and 1 metre when using 0.5mm sheeting.

HOW FAR CAN 8 inch Z purlin span?

An eight-inch purlin can span 25 feet.

How do you select purlin?

Tips For Choosing Best Purlin For Roof Framing:

  1. #1 – Choose The Right Material: Purlins hold tons of large roof decks and are supported by the framework of rafters or walls and steel beams.
  2. #2 – Pick The Perfect Type of Purlin.
  3. #3 – Purlin Installation:
  4. #4 – No Welding / Heat Cut:

How thick are Z purlins?

Our full range of thickness available for Z purlins are: 1.2mm. 1.3mm. 1.4mm.

What is the standard spacing of purlins?

The spacing of purlins on roofs and girts on wall is usually 4 to 6 ft. Numbers 20 and 22, U.S. Standard gage, are generally used for roofing; No. 24 for siding.

How Far Will 8 inch c purlin span?

25 feet
A six-inch purlin can span 18 feet. An eight-inch purlin can span 25 feet. A ten-inch purlin can span 30 feet.

How far will a 6 C purlin span?

18 feet
A four-inch purlin can span 12 feet. A six-inch purlin can span 18 feet. An eight-inch purlin can span 25 feet.

What is the maximum roof slope for purlin load tables?

Purlin load tables are valid up to and including 25° roof slopes. For slopes greater than 25 °, use our MetSPEC design software. You can download our MetSPEC 14 software from the list below. Download our purlin technical manual for more information.

What is the cladding weight of a purlin table?

Download our purlin technical manual for more information. Tables are based on a deflection limit of Span/150 and adopt a cladding weight of 12.5kg/m² on elevation. Tables are based on a deflection limit of Span/150 and adopt a cladding weight of 12.5kg/m² on elevation.

How much of a purlin span should be between supports?

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. DESIGN & SPECIFICATION DATA

How do you calculate the length of a purlin?

SPAN – MM SPAN – MM OVERALL PURLIN LENGTH = SPAN + 70MM + (LAP/2) LAP 3 SPAN LAPPED SPAN – MM SPAN – MM SPAN – MM LAP END SPAN END SPAN OVERALL PURLIN LENGTH = SPAN + 70MM + (LAP/2) OVERALL PURLIN LENGTH = SPAN + 70MM + LAP