Skip to the beginning of the images gallery

Keystone BOX/K-150 Solid Wall Box Lintel 3750mm INS

SKU

KBX15375INS

£264.42 £220.35

Product Information

Keystone BOX/K-150 Solid Wall Box Lintel, 3750mm (12ft 4in) length for reliable support
Designed for 150mm (6in) wide solid walls, suitable for internal openings
Features built-in insulation (INS) for improved thermal efficiency on site
Perforated design provides a secure plaster key for finishing
Minimum 150mm end bearing on each side required; lintel must be bedded on mortar

Details

The Keystone BOX/K-150 Solid Wall Box Lintel 3750mm INS is a specialist structural lintel designed for builders and site managers working with 150mm solid walls. Its integrated insulation improves thermal performance, making it a smart choice for projects where energy efficiency is important. Please note, this lintel is intended for internal openings and must be installed with adequate bearing and bedding.

Application

This lintel is typically used to support internal wall openings such as doorways and windows in solid masonry walls ranging from 100mm to 215mm thick. The robust box design carries the full load of wet masonry immediately upon installation, ensuring structural integrity throughout the build. Its perforated surface allows plaster to key in effectively, providing a clean and durable finish. Propping is recommended during construction to speed up the process and maintain safety.

Dimension

Length: 3750mm (12ft 4in)
Height: 215mm (8.5in)
Width: 145mm (5.7in)
Suitable for wall widths from 100mm to 215mm

Material

Steel with integrated insulation layer for enhanced thermal efficiency

Type

Box lintel designed for solid masonry walls
Standard duty structural support

Important: A minimum end bearing of 150mm on each side of the opening is required, and the lintel must be bedded on mortar. This product is supplied as shown; images are for illustration only. For technical advice or further assistance, please contact our sales team.

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	3750mm
Weight	63.730000
Manufacturer	Keystone
Sap Id	KBX15375INS

Customer Reviews

No reviews yet on this product

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