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Keystone BOX/K-150 Solid Wall Box Lintel 2550mm INS

SKU

KBX15255INS

£108.54 £90.45

Product Information

Keystone BOX/K-150 Solid Wall Box Lintel, 2550mm (8ft 4in) length for solid walls 100-215mm wide
Features built-in insulation (INS version) for improved thermal efficiency on site
Designed for standard duty loads, ideal for internal openings in solid masonry walls
Perforated surface acts as a plaster key to ensure strong finish adhesion
Must be installed with minimum 150mm end bearing on mortar; lintels should be propped during construction

Details

The Keystone BOX/K-150 Solid Wall Box Lintel 2550mm INS is a specialist load-bearing lintel designed for builders and contractors working with solid masonry walls. With integrated insulation, this lintel offers enhanced thermal performance while reliably supporting internal openings in walls between 100mm and 215mm thick. Please note, lintels must be installed with proper bearing and propping for best results.

Application

This box lintel is commonly used in solid wall construction to support brickwork or blockwork above doors, windows, and other openings. Its insulated design helps reduce thermal bridging, making it well-suited for projects where energy efficiency is a priority. The perforated face provides a secure key for plaster, ensuring a durable and neat finish. Ideal for site managers and tradespeople requiring a dependable lintel that meets both structural and thermal standards.

Dimension

Length: 2550mm (8ft 4in)
Height: 150mm (6in)
Width: 145mm (5.7in)
Suitable for wall widths from 100mm to 215mm (4in to 8.5in)

Material

Steel with integrated insulation layer
Perforated surface for plaster key

Type

Box lintel for solid wall construction
Standard duty structural lintel with insulation

Important: Keystone box lintels must be bedded on mortar with a minimum 150mm bearing at each end and propped during installation. This ensures safe load transfer and helps maintain construction speed. For further technical details or advice, please contact our sales team.

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	2550mm
Weight	25.620000
Manufacturer	Keystone
Sap Id	KBX15255INS

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Delivery Information

Delivery availability

We deliver to most mainland UK addresses. Some postcode areas are excluded – please see the full list below.

Delivery charges

Delivery costs vary depending on your location, the products ordered, and the delivery method selected. All delivery charges are calculated clearly at checkout.

Fuel Surcharge

Information on our added Fuel Surcharge can be found at https://condell-ltd.com/fuel-surcharge-notification

Delivery dates

You can request a preferred delivery date at checkout. While we aim to meet this wherever possible, availability may depend on stock levels and third-party delivery schedules. If your chosen date is unavailable, a member of our team will contact you to arrange an alternative.

Delivery method

All deliveries are made kerbside as standard. For health and safety reasons, drivers are unable to carry materials beyond the kerb. If you have specific access requirements, please contact us before placing your order.

Delivery exclusions

We currently do not deliver to the following postcode areas:

AB16, AB21–22, AB30–AB38, AB41–AB56, BT1–BT94, CA2, CA15, CA28, DD1, DD8, DD9, DG1, DG2, DG10–DG14, DG16, FK18–FK20, GY1–GY9, HS1–HS9, IM1–IM9, IV1–IV5, IV7, IV12–IV13, IV21–IV28, IV30–IV36, IV40–IV56, JE1–JE4, KA1, KA4–KA6, KA14–KA15, KA18–KA21, KA27–KA30, KW1–KW3, KW6–KW17, KY6–KY10, KY13–KY16, LL49, LL58–LL62, LL64–LL78, PA17–PA78, PH11, PH19–PH26, PH30–PH33, PH35–PH38, PH40–PH44, PH49–PH50, PO30–PO41, SA68, SA71, ZE1–ZE3

Important delivery terms

Shortages must be reported within 48 hours and noted on delivery paperwork
All deliveries must be signed for; redelivery charges may apply
Deferred deliveries may incur storage charges
Collected orders are not subject to delivery charges
Returns are subject to a 25% restocking fee (delivery charges excluded)
Made-to-measure items are non-refundable
Reasonable access to the delivery point must be available; additional charges may apply