C-PURLINS: DIMENSIONS & PROPERTIES
RECOMMENDED HOLING, CLETS AND FASTENING DETAILS
Standard THI-C sections are supplied with optional holes punched to order. Punched C-section can be supplied with H14, H16, H18 or elongated holes, with recommended cleat size as stated in table below.
GALVANISED STEEL C-PURLIN
DIMENSIONS AND PROPERTIES
The C-Purlins are normally used as simple supports. Sections of sufficient length may also be used continuously over two or more spans to reduce deflection.
DETAIL OF STANDARD TIE ROD
HOLES DETAILS, CLEATS, FASTENING
The Purlin Quick Selection Table is derived i accordance to BS5950: 1987, ‘Code Of Practice for Design of Cold Formed Section” with a maximum roof pitch of 50 degrees and roofing sheet distributable load of 6.55kg.