Cullen Technical Guide 2024

/

Rapid Build Masonry Joist Hanger RB–JHI

— Suitable for use with Open Web Joists, I–Joists and trusses — Non return hangers are suitable with no masonry above. Return only required for increased load capacity

In Situ

— No masonry is required above the hanger (unless stated for increased load capacity). — The masonry supporting the hanger must be cured for 3 days prior to loading the floor. — The RB–JHI/RB–JHIR does not provide restraint, therefore restraint straps may be required (see pages 128 – 129)

Load Data

Characteristic Capacity (kN)

Fixings (3.4 x 35mm)

Masonry Above (Min 675mm)

Masonry Crushing Strength

Hanger Type

Uplift

2.8N/mm 2

3.5N/mm 2

7.0N/mm 2

Incoming

RB–JHI RB–JHIR

No No

2 2

n/a n/a

12.56 16.00

15.71 20.01

21.26 28.31

2

2.00 4.50

RB–JHI/RB–JHIR

Yes

19.83

24.79

39.60

5 (2)

Enhanced Uplift (2)

Hanger Depth (mm)

Min Timber Depth (mm)

— Fixings into the incoming joist/truss are required to resist uplift — Increased uplift figures can be achieved by nailing the additional triangular nail holes into incoming member — Web stiffeners required for I–Joists, 2No end blocks required for Open Web Joists & minimum bottom chord depth/vertical required for trusses — Requires minimum full storey of masonry above to achieve values

150

84

175 – 195 225 – 240

122 172 195 235 300 350

250 300 350 400

Incorrect Installation

MAX 6MM

NO GAP

MIN 250MM

MAX 2.5MM THICKNESS OF RB-TOP PLATE

Do not install the hanger with a gap between the hanger and the face of the block work.

Do not install the hanger onto a timber wall plate.

Do not install the hanger with a gap exceeding 6mm between the joist/truss and the hanger.

Do not cut/modify the top flanges. These are critical to the performance.

The latest most up to date version will always be online and not in print or in downloaded pdf.

17

Technical support 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk

Made with FlippingBook Annual report maker