PURLINS & GIRTS

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STANDARD HOLE LOCATIONS HST 100 (14mm holes only) 0.5 SPAN 0.5 SPAN 64 38 38 64 76 64 38 = 0.35 SPAN One Sag Rod 0.35 SPAN = HST 100 38 64 76 76 Two Sag Rods HST 150, HST 200, HST 250, HST 350, HST 400 38 0.5 SPAN 0.5 SPAN g One Brace HST 150 0.35 SPAN 0.35 SPAN 38 Two Braces 0.3 SPAN 0.2 SPAN 0.2 SPAN 0.3 SPAN g LAPPED PURLINS Three Braces SPAN HST 200, HST 250, HST 300, HST 350, HST 400 3 8 0.5 LAP 0.5 LAP Braces as above 26 PURLINS & GIRTS DESIGN GUIDE
BRACING SPEED CHANNEL Speed Channel is designed to fit purlins pre-punched with round 18mm diameter holes. The apex purlin has a bolted connection, thereafter hook connections are used to the eaves. The eaves purlin has a bolted connection which can be supplied adjustable if required. To maintain a continuous line, the eaves and apex purlins require holes offset 25mm each side of the nominal bracing line. Speed Channel bracing length should be calculated at the purlin spacing less 2mm. SPEED CHANNEL BRACKETS SPEED CHANNEL BRACKETS NB. Brace length equal to purlin spacing less 2mm 100 x 32 x 0.95 Purlin Purlin Standard Speed Channel HST Purlin Type AA Type AB Type AA Adjustable Channel bracing Type AA Brace Channel Type AD Brace Rod SPEEDBRACE END IDENTIFICATION TYPE A TYPE B TYPE C TYPE D Fixed Hook Adjustable Hook Adjustable Bolted Fixed Bolted 27
Page 1 and 2: DESIGN GUIDE PURLINS & GIRTS ROOFIN
Page 3 and 4: GENERAL INFORMATION INTRODUCTION HS
Page 5 and 6: IDENTIFICATION OF SPAN TYPE SINGLE
Page 7 and 8: ULTIMATE UNIFORMLY DISTRIBUTED LOAD
Page 15 and 16: ULTIMATE AXIAL LOAD - CONCENTRIC HS
Page 17 and 18: SPLICE JOINTS SPLICE DESIGN HST 150
Page 19 and 20: SECTIONAL PROPERTIES PURLIN SIZE AR
Page 21 and 22: WORKED EXAMPLES (CONTINUED) EXAMPLE
Page 23 and 24: WORKED EXAMPLES (CONTINUED) EXAMPLE
Page 25: DETAILING AND INSTALLATION ORDERING
Page 29 and 30: STANDARD CLEAT DETAILS HST 100 280
Page 31 and 32: FLOOR JOIST SPAN TABLE HST SINGLE S

PURLINS & GIRTS

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