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Restraint Straps (Domestic Floors)
Perpendicular Restraint
Floor Level
Detail
Region
Ground Floor
1st Floor
2nd Floor
England & Wales
PFS required at 2m max centres
Perpendicular
PFS required at 1.25m max centres
Scotland
PFS required at 2m max centres
Please refer to page 138 for further information on PFS straps PFS surface fixed to I–Joist
— Noggins to be installed between the I-Joists with 2No UZ-Clips staggered either side (Noggins to be minimum width of half the I-Joist depth, to a maximum of 150mm x minimum depth 38mm - min C16 grade timber) — Once nailed into position a skew nail is placed in the opposite corner to secure connection — After fitting all noggins the PFS strap can then be located tight to the block work and centred on the noggins — The strap should be nailed with a minimum of 8No 3.4 x 35mm square twist nails evenly spaced and into at least every joist — Strap must extend over a minimum 3No joists
— Only suitable when joists line through with top of block work
PFS through web of I–Joist
— Cut a small slot in the I–Joist web, just under the top flange — Slide the PFS through the slots and position tight against the block work — To provide a fixing for the PFS, noggins must be installed between the I-Joists (Noggins to be minimum depth of half the I-Joist depth, to a maximum of 150mm x minimum width 38mm - min C16 grade timber) — Each noggin should be nailed in place through the I–Joist web — The strap should be nailed with a minimum of 8No 3.4 x 35mm square twist nails evenly spaced into the noggins — Strap must extend over a minimum 3No joists
— Not suitable when joists line through with top of block work
PFS through web of Open Web Joist
— Strongback to be installed as per manufacturer’s guidelines — Position PFS tight to block work and centred on block — The strap should be nailed with a minimum of 8No 3.4 x 35mm square twist nails evenly spaced into the noggins — Strap must extend over a minimum 3No joists
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Technical support 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk
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