Simpson Strong-Tie JHA450/38 38mm Long Leg

Joist Hanger For Timber to Timber Pre-galv.

Simpson Strong-Tie

Product Code: 78JHA450038

Model Code: JHA450/38

Brand: Simpson Strong-Tie

Finish: Pre Galvanised

From £3.05 inc VAT ( Priced Each )

(Include VAT?)

Joist Width:

Quantity:

15 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	3.5640	£3.56
50+	3.0480	£3.05

Prices inc VAT based on Each

Order by 2pm for Next Day Delivery (Mon-Fri)

FREE Standard Delivery on Orders over £100*

TIMBER-TO-TIMBER CONNECTORS / LONG LEG JOIST HANGERS

Simpson Strong-Tie JHA450/38 Long Leg Adjustable Strap Joist Hanger (38mm Width)

The Simpson Strong-Tie JHA450/38 is a heavy-duty, long-leg height-adjustable joist hanger engineered to carry 38mm wide solid sawn timber joists from supporting timber beams, steel flitch plates, and carrying headers. Manufactured from heavier 1.2mm pre-galvanised structural mild steel (Z275 coating), the JHA450 version features extended 481mm straps designed for applications where greater vertical adjustment or deeper member drops are required. It is extensively specified in loft conversions and refurbishment projects where incoming joists run below the level of the supporting beam. Offering broad structural flexibility, it can be installed via standard wrap-over (minimum 45mm return), full flush face-fix, or below-support drop configurations. Each hanger features its part number and size stamped permanently into the seat for straightforward site inspection and building control sign-off.

RECOMMENDED FASTENERS & INSTALLATION NAILING

Published structural capacities are certified using Simpson Strong-Tie 3.75 x 30mm Square Twist Nails (N3.75x30) or CSA4.0x30 Connector Screws. Can be fixed either using the Wrap-Over configuration (8 face nails, 4 top nails, and 6 joist nails), the full Face-Fix installation schedule (20 header nails and 6 joist nails), or Below Support / Loft Conversion installation (4 face nails, 4 top nails, and 6 joist nails). A minimum wrap-over return of 45mm is required where applicable.

CLICK HERE TO VIEW OUR FULL RANGE OF SIMPSON JHA JIFFY JOIST HANGERS

TECHNICAL SPECIFICATION DRAWING & KEY DIMENSIONS

Simpson Strong-Tie JHA450 technical dimension diagram

Key	Dimension Description	JHA450/38 Value
A	Internal Joist Width	38 mm
B	Total Overall Height	481 mm
C	Seat Depth (Bearing Base)	50 mm
D	Strap Width	51.5 mm
E	Side Flange Height	191 mm
F	Bottom Flange Projection	61.5 mm
t	Steel Plate Thickness	1.2 mm

TECHNICAL DATA & FASTENER SPECIFICATIONS

Specification Parameter	Engineered Values & Materials
Material & Coating	Pre-galvanised mild steel to Z275 specification (Service Class 2 indoor)
Fastener Hole Schedule	Header: 38 round holes (Ø4mm) / Joist: 6 oblong holes (Ø6 x 4mm)
Compatible Joist Sizes	38mm solid sawn timber joists (Single 1x38mm timber)
Characteristic Capacity (Wrap-Over, C24)	Downward R1,k: 10.9 kN / Uplift R2,k: 3.3 kN (with 3.75x30mm square twist nails)
Characteristic Capacity (Face-Fix, C24)	Downward R1,k: 10.9 kN / Uplift R2,k: 3.3 kN (with 3.75x30mm square twist nails)
Characteristic Capacity (Loft Below Support, C24)	Downward R1,k: 9.6 kN (with 3.75x30mm square twist nails)
Approvals & Compliance	UKCA / CE Marked, ETA assessed (European Technical Assessment), EN 15804 EPD

KEY STRUCTURAL PERFORMANCE ADVANTAGES

Extended 481mm Long Leg Reach: Ideal for carrying dropped joists, step-down floor levels, and connections where the header sits significantly above the ceiling level.
Heavy-Duty 1.2mm Steel Core: Formed from 1.2mm thick structural steel with an increased 51.5mm strap width, providing higher load resistance and rigidity under heavy loads.
Dedicated Loft Conversion Installation: Certified for below-support installation where the hanger strap extends beneath the carrying member, making it the industry standard for attic conversions.
Higher Uplift Resistance: Equipped with 6 dedicated joist fastening holes providing an uplift capacity of up to 3.3 kN to counter negative wind load forces.

CLICK HERE TO SEE THE FULL SIMPSON JHA JIFFY RANGE

JHA Data Sheet

Declaration of Performance

Logistics Excellence

Fast, Reliable Delivery Nationwide

Delivering structural fixings, builders metalwork, tools, and site essentials straight to your project via our dedicated regional fleet and nationwide carrier partners.

TRUCK

DPD Pickup Point

Flexible

Collect small tool boxes, boxed fixings, and hardware from thousands of local shops and 24/7 lockers on your own schedule.

Flat Rate £5.95 + VAT

Greener, lower-cost collection with zero waiting on site.

Direct Site Delivery

Direct dispatch to your commercial site, project boundaries, or workshop door across the UK mainland via tracked road freight.

Standard Rate £9.95 + VAT

FREE Standard Shipping on qualifying orders over £100!

Next Day Dispatch

Urgent material requirements. Stock items are priority-picked, packed, and assigned to rapid-transit freight networks.

Order Cut-Off Order by 2:00 PM (Mon–Fri)

Fast-tracked transit for critical construction path deadlines.

Active construction site framing and rapid transit transport delivery truck keeping builds moving

How We Keep Your Builds Moving

We operate our own dedicated logistics vans out of Luton alongside leading national freight carriers, ensuring full trace visibility from our warehouse shelves straight to site.

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 cartons or strapped securely to 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 courier 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 alternative transit grids. Please review checkout calculations for accurate real-time weights.
Northern Ireland, Isle of Man & Channel Islands: Water-crossing logistical paths require clean custom manifesting lines.
Heavy Oversized Pallets: Extended multi-ply girder connectors, structural space straps, 3m channel unistrut, or high-volume masonry hangers pass through dedicated heavy haulage grids.

Commercial & Trade Governance

General Terms & Conditions of Sale

Standard trading terms governing trade accounts, component supply contracts, delivery obligations, and commercial agreements with Metro Fixings Ltd.

LEGAL

Credit Account Terms

Commercial credit accounts are strictly payable 30 days end of month following invoice date, subject to approved credit limit boundaries.

Title Retention

Full legal title and ownership of all supplied hardware remains with Metro Fixings Ltd until all outstanding invoices are cleared in full.

Site Logistics

Delivery schedules are provided in good faith. The buyer is responsible for arranging safe offloading facilities at the designated site location.

Notice of Claims

Consignment shortages or damaged goods must be recorded on delivery notes and formally reported to our trade desk within 24 hours.

1. Contract Formation & Quotations

All contracts entered into with Metro Fixings Ltd incorporate these Terms and Conditions of Sale to the exclusion of all other terms, including any buyer purchasing conditions:

Quotations issued by Metro Fixings Ltd constitute an invitation to treat and remain valid for 30 days unless formally withdrawn or adjusted prior to written acceptance.
Orders placed by telephone, email, or web portal are binding only upon written confirmation or dispatch of goods from our distribution hubs.
Bespoke fabrications, custom-threaded components, or non-catalogue items sourced specifically for site requirements cannot be cancelled once manufacturing or procurement has commenced.

2. Pricing, Invoicing & Credit Terms

Price Variances: Prices are quoted exclusive of UK VAT and delivery charges. We reserve the right to revise prices prior to dispatch to reflect raw material fluctuations or transport cost increases.

Credit Accounts: Approved trade credit accounts operate on strict 30 days net terms (payable by the end of the month following the invoice date).

Late Settlement: Overdue account balances incur statutory interest under the Late Payment of Commercial Debts Act at 8% above the Bank of England base rate, alongside recovery administration costs.

3. Delivery, Risk & Site Access

Deliveries are conducted via our fleet or accredited courier transport under the following conditions:

Delivery Dates: Target arrival dates are provided as estimates. Metro Fixings Ltd accepts no liability for direct or indirect losses, site delay penalties, or standing time costs caused by transit disruptions.
Risk Transfer: Risk of damage or loss passes to the buyer upon completion of delivery offloading at the designated site coordinates or trade counter collection.
Site Unloading: The customer must ensure safe site access and adequate mechanical unloading gear (forklifts or site teams) for bulk pallets or heavy structural fixings.

4. Retention of Title

Legal and beneficial title to all supplied goods remains with Metro Fixings Ltd until the customer has paid for them in full, together with all other sums due on any account. Until title passes, the buyer must store the goods separately, identifiable as Metro Fixings Ltd property, and keep them fully insured.

5. Warranties & Limitation of Liability

We warrant that goods conform to manufacturer specifications and relevant UK engineering compliance standards. Our liability for defective items is limited strictly to replacement or credit value refund. Under no circumstances shall Metro Fixings Ltd be liable for loss of profit, operational downtime, or indirect consequential damage.

Commercial Accounts Desk

Trade Account Support

Need to discuss credit terms, request statement copies, or query an invoice line?

Call our accounts office directly on 01707 375172 or email sales@metrofixings.co.uk.

Registered Trading Office

Metro Fixings Ltd
Unit 14 Windmill Trading Estate
Thistle Road, Luton
Bedfordshire, LU1 3XJ

Company Reg: 08434688
VAT Number: GB 158 5347 18

Governing Jurisdiction: All commercial contracts and disputes shall be governed by and construed in accordance with English Law, subject to the exclusive jurisdiction of the Courts of England & Wales.

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