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Simpson Strong-Tie IHS235 235mm

I-Joist Hole Support (Pair)

Simpson Strong-Tie

Product Code: 78IHS235

Model Code: IHS235

Brand: Simpson Strong-Tie

Finish: Pre Galvanised


£41.44 inc VAT ( Priced Each )

(Include VAT?)   

Quantity:
 
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Delivery expected in 2/3 days

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Order by 2pm for Next Day Delivery (Mon-Fri)
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STRUCTURAL TIMBER CONNECTORS / I-JOIST HOLE SUPPORTS

Simpson Strong-Tie IHS235 I-Joist Hole Support (For 235mm–240mm Joists)

The Simpson Strong-Tie IHS235 is an innovative web-reinforcement solution engineered to structurally strengthen 235mm to 240mm deep I-joists when web holes must be cut in locations normally restricted by standard building guidelines. Manufactured from 1.5mm pre-galvanised mild steel, the IHS system allows rectangular services holes—up to 135mm high by 250mm wide—to be positioned as close as 50mm from the bearing face. Supplied as two sets of interlocking plates (one complete set per side of the joist), it can be retrofitted even around existing pipework, eliminating expensive and labor-intensive timber trimming for Soil Vent Pipe (SVP) runs and HVAC ducting.

RECOMMENDED INSTALLATION FASTENERS

To maintain full shear capacity and satisfy UK building control standards, the IHS235 must be fixed into the top and bottom chords using 3.75x30mm square twist nails. Fastener count depends on the bracket opening width: 24 nails for a 150mm opening or 32 nails for a 250mm opening (per hole support set). Ensure a minimum overlap of 45mm between the interlocking plate halves.

CLICK HERE TO PURCHASE 30MM SQUARE TWIST NAILS FOR YOUR INSTALLATION


TECHNICAL SPECIFICATION DRAWING & KEY DIMENSIONS

Simpson Strong-Tie IHS235 I-joist hole support technical drawing dimension diagram
Key Dimension Description IHS235 Value
C Overall Bracket Height 231 mm
D1 Minimum Opening Width 150 mm
D2 Maximum Opening Width 250 mm
Max Hole Max Hole Aperture (Depth x Width) 135mm x 250mm
t Steel Plate Gauge Thickness 1.5 mm

TECHNICAL DATA & FASTENER SPECIFICATIONS

Specification Parameter Engineered Values & Materials
Compatible Joist Height 235mm to 240mm deep I-joists (James Jones JJI, Masonite, Boise, etc.)
Joist Ply Compatibility Suitable for single-ply and double-ply I-joist configurations
Material Steel Grade 1.5mm pre-galvanised mild steel
Corrosion Protection Grade Pre-Galvanised (Service Class 1 and 2 internal structures)
Nails Required per Hole Set 24 No. (150mm opening) or 32 No. (250mm opening) 3.75x30mm Square Twist Nails
Minimum Bearing Clearance 50mm from edge of cut hole to inner face of support bearing

KEY STRUCTURAL PERFORMANCE ADVANTAGES

  • Close-to-Bearing Hole Placement: Enables service holes to be cut as close as 50mm to external support walls, simplifying Soil Vent Pipe (SVP) and duct runs without compromising shear strength.
  • Interlocking Retrofit Design: Supplied as 2 pairs of sliding, interlocking plates that easily fit over installed joists or around pre-existing services.
  • Variable Opening Adjustment: Easily adjusts horizontally to accommodate hole widths ranging from 150mm up to 250mm.
  • Saves Time & Trimming Costs: Eliminates complex joist-trimming timber details when rerouting large soil or ventilation pipes through floor zones.
CLICK HERE TO SEE THE FULL IHS HOLE SUPPORT RANGE
Data Sheet
Data Sheet


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.
New Service Available

Introducing DPD Pickup: Collect at Your Convenience

While our dedicated Metro vehicle fleet carries out routine site deliveries across London and the Home Counties, nationwide deliveries outside our van radius travel via DPD. Don't want to wait around on site or pay £9.95 courier carriage for a few packs of fixings? Choose DPD Pickup Point Collection at checkout to pick up your order locally from £5.95 + VAT.

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.
NEED SPECIFIC AM DELIVERY TIMES OR TIMED SITE COORDINATION? If your project features demanding time windows, unique site access restrictions, or crane offload coordination, contact our central logistics desk directly on 01707 375172 or email your schedule over to finalise arrangements.
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.

Our Address

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

Contact Details

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