Floors
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 84 for further information on PFS straps For all applications strap must extend over a minimum 3No Joists I–Joist / Open Web Joist
— Noggins to be installed between the I-Joists or Metal Web Joists using 2No UZ-Clips and 2No. skew nails staggered either side — 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
— Only suitable when joists line through with top of block work
— Noggins - NHBC Requirements — Width: min. ½ I-Joist depth, max. 150mm — Depth: min. 38mm — Timber: min. C16 grade
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 nailed in place between the I-Joists 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
— Not suitable when joists line through with top of block work
Noggins - NHBC Requirements — Width: min. 38mm — Depth: min. ½ I-Joist depth, max. 150mm — Timber: min. C16 grade
PFS through web of Open Web Joist
— Strongback/Additional Noggins 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
The latest most up to date version will always be online and not in print or in downloaded pdf.
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Technical support 01592 771132 / technical@itwcp.com / https://www.itwcoe.com
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