Cullen Technical Guide 2026

Floors

PST strap with non–restraint hanger

— The strap should be nailed with a minimum of 8No 3.4x35mm Square Twist Nails into the joist top flange/chord

Floor Level

Detail

Region

Ground Floor

1st Floor

2nd Floor

Non–Restraint Hangers (JHI/JHIR/ RB–JHI/RB–JHIR)

England & Wales

PST required at 2m max centres

PST required at 2m max centres

PST required at 1.25m max centres

Scotland

Please refer to page 85 for further information on PST straps and table for the correct hanger / strap combination.

Scan or click to view installation videos

PSB strap with restraint hanger

— The strap should be nailed with a minimum of 8No 3.4x35mm Square Twist Nails into the joist bottom flange/chord

Floor Level

Detail

Region

Ground Floor

1st Floor

2nd Floor

No additional restraint is required (additional PSB straps required each side of opening where openings exceed 600mm)

PSB straps required at 2m max centres

England & Wales

Built in

PSB straps required at 1.25m max centres

Scotland

Please refer to page 85 for further information on PSB straps

Scan or click to view installation videos

PSC strap with non–restraint hanger

— The strap should be nailed with a minimum of 8No 3.4x35mm Square Twist Nails into the joist top flange/chord

Floor Level

Detail

Region

Ground Floor

1st Floor

2nd Floor

Non–Restraint Hangers (JHI/JHIR/ RB–JHI/RB–JHIR)

England & Wales

PSC required at 2m max centres

PSC required at 2m max centres

PSC required at 1.25m max centres

Scotland

Please refer to page 85 for further information on PSC straps and table for the correct hanger / strap combination.

Scan or click to view installation videos

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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