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Simpson Strong-Tie JHA450/137 137mm Long Leg

Joist Hanger For Timber to Timber Pre-galv.

Simpson Strong-Tie

Product Code: 78JHA450137

Model Code: JHA450/137

Brand: Simpson Strong-Tie

Finish: Pre Galvanised


From £3.05 inc VAT ( Priced Each )

(Include VAT?)   
Joist Width:

Quantity:
 
436 IN STOCK
Sorry! This product is only sold in multiples of 0.
BULK QUANTITY DISCOUNTS:
Qty Price Per Unit Price Per 1 Units
1 - 49 3.4200 £3.42
50+ 3.0480 £3.05
Prices inc VAT based on Each
Order by 2pm for Next Day Delivery (Mon-Fri)
Delivery Icon FREE Standard Delivery on Orders over £100*




The Simpson Strong-Tie JHA450/137 is a premium, heavy-duty long-leg height-adjustable joist hanger engineered for supporting 137mm wide solid sawn timber joists from carrying timber members. Specially designed with an extended profile for high-load applications such as loft conversions or where the joist extends below the header line, this robust hanger is manufactured from 1.2mm thick pre-galvanised mild steel to achieve maximum structural capacity.

Product Dimensions & Attributes

  • A (Joist Width): 137mm
  • B (Overall Height): 432mm
  • C (Seat Depth): 50mm
  • D (Flange Width): 51.5mm
  • E (Strap Length): 142mm
  • F (Total Depth): 61.5mm
  • t (Material Thickness): 1.2mm
  • Header Holes: 38
  • Joist Holes: 6
  • Unit Weight: 0.63 kg
  • Material Finish: Pre-Galvanised Mild Steel (Z275 Coating)
Simpson Strong-Tie JHA Dimension Blueprint Drawing

Key Performance Features

  • Long-Leg Configuration: Engineered for structural installations requiring deeper reach, offering a total profile height of 432mm optimized for modern timber frames and loft expansions.
  • Heavy-Gauge Steel: Built using premium 1.2mm material thickness, designed to resist deflection and hold rigid connection lines under significant dead loads.
  • Wider Steel Strap: The advanced wider strap provides greater surface area coverage across the supporting member, widening nail spacing and drastically improving load capacity.
  • Stamped Nailing Guides: Minimum and maximum nailing schedules are stamped permanently into the steel strap to guarantee site compliance for sub-contractors and site inspectors.
  • Clear Post-Fix Inspection: The unique model number and physical sizing are permanently stamped directly into the seat base for effortless safety identification even after installation.

Engineered Performance & Safe Working Loads (C16 Timbers)

1. Wrap Over Installation Schedule

Fixing Layout Fasteners (3.75x30mm) Char. Capacity (R1,k) SWL Medium Term SWL Long Term Short Term Uplift
Wrap Over 4 Face / 8 Top / 6 Joist 13.2 kN 6.3 kN 5.5 kN 1.6 kN

2. Face Fix Installation Schedule

Fixing Layout Fasteners (3.75x30mm) Char. Capacity (R1,k) SWL Medium Term SWL Long Term Short Term Uplift
Face Fix Only 20 Face / 6 Joist 10.6 kN 5.1 kN 4.4 kN 1.6 kN

3. Below Support (Loft Conversion) Installation Schedule

Fixing Layout Fasteners (3.75x30mm) Char. Capacity (R1,k) SWL Medium Term SWL Long Term
Below Support standard 4 Face / 4 Top / 6 Joist 9.6 kN 4.6 kN 4.0 kN
Below Support alternative 20 Face / 6 Joist 9.6 kN 4.6 kN 4.0 kN

Note: All certified characteristic and safe working load (SWL) capacities are strictly dependent on utilizing industry-standard 3.75 x 30mm square twist nails or approved CSA4.0x30 screws across all specified holes. Minimum wrap over of 45mm is required where applicable.

JHA Data Sheet
JHA Data Sheet
Declaration of Performance
Declaration of Performance


Logistics Excellence

Fast, Reliable Delivery Nationwide

Getting your heavy structural fixings, framing connectors, and site essentials to your workshop or straight to the job site exactly when you need them.

TRUCK

Standard Mainland Delivery

Our reliable baseline shipping network services core industrial hubs and regional sites across the UK mainland via premium tracked courier freight routes.

Shipping Rate £8.95 + VAT
FREE Standard Shipping on orders over £100!

Next Working Day Dispatch

Tight project deadlines. Secure premium prioritised material line allocations. Items are picked, palletised, and routed on premium rapid-transit cargo links.

Order Window Order by 2:00 PM (Mon-Fri)
Fast tracked transit for critical construction paths.
Active construction site framing and rapid transit transport delivery truck keeping builds moving

How We Keep Your Builds Moving

We partner with leading heavy industrial parcel and parcel-freight carriers across the country to maintain real-time tracking from our central warehouse shelves straight to your signature pad.

01.
Instant Hub Sorting: Approved orders pass straight to active pick queues via our localised automated barcode stock framework.
02.
Heavy Component Packing: Structural products are safely stored in industrial reinforced crates or strapped securely to custom pallets to fully safeguard fine threads and anti-corrosion zinc surfaces.
03.
Tailgate On-Site Offloading: Bulk shipments drop cleanly at your structural site boundary line via integrated tail-lift carrier transport systems.

Logistics Scope & Out-Of-Zone Shipments

Standard pricing arrays map explicitly to structural mainland UK postal grids. Supplementary transit routing variables, variable lead times, or specialised carrier adjustments apply across high-altitude or outlying maritime zones:

  • Scottish Highlands & Islands: Postcode structures matching KW, IV, PA, and PH configurations map to premium alternative transit grids. Please review checkout calculations for accurate real-time weights.
  • Northern Ireland, Isle of Man & Outer Channels: Specialised water-crossing logistical paths require clean custom manifesting lines.
  • Heavy Oversized Pallets: Extended multi-ply girder connectors, structural space straps, or high-volume masonry hangers exceeding standard bulk dimensions pass through dedicated heavy haulage grids.
*** NEED SPECIFIC AM DELIVERY TIMES OR SITE COORDINATION ARRANGEMENTS *** If your project features demanding time windows, unique site restrictions, or crane offload coordination, contact our central logistics team directly on 01707 375172 or email your schedule over to finalise arrangements.


 


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Our Address

Metro Fixings Ltd
Unit 3 Tewin Court, Tewin Road
Welwyn Garden City, AL7 1AU

Contact Details

Telephone: 01707 375172
Fax: No Fax
Email: sales@metrofixings.co.uk