Skip to the beginning of the images gallery

Keystone BOX/K-100 Solid Wall Box Lintel 4500mm INS

SKU

KBX145INS

£311.04 £259.20

Product Information

Keystone BOX/K-100 Solid Wall Box Lintel, 4500mm (14ft 9in) length for reliable spanning of internal openings.
Designed for solid walls 100-215mm thick, supporting standard duty loads efficiently.
Includes internal insulation ('INS' version) to enhance thermal performance on site.
Box lintel construction supports full wet masonry load immediately after installation.
Minimum 150mm bearing each side, bedded on mortar; lintels should be propped for faster, safer construction.

Details

The Keystone BOX/K-100 Solid Wall Box Lintel 4500mm INS is a specialist structural lintel designed for builders and contractors working with 100mm wide solid walls. This insulated version provides enhanced thermal performance, making it an excellent choice for internal openings where both strength and energy efficiency matter. Please note, lintels require a minimum bearing and proper bedding for safe installation.

Application

Specifically engineered for use in solid masonry walls ranging from 100mm to 215mm thickness, this box lintel supports standard duty loads such as internal door and window openings. Its box profile allows it to carry the full weight of wet masonry immediately after installation, speeding up build times. Ideal for site managers and tradespeople looking for a reliable, robust lintel solution with added insulation benefits.

Dimension

Length: 4500mm (14ft 9in)
Height: 215mm (8½in)
Width: 95mm (3¾in)
Suitable for wall widths: 100-215mm

Material

Steel lintel with integrated insulation layer for thermal efficiency
Durable construction to support wet masonry loads

Type

Box lintel designed for solid wall applications
Standard duty structural support lintel

Important: All box lintels must have a minimum end bearing of 150mm on each side, bedded on mortar. It is recommended that lintels are propped during construction to ensure safety and speed. For further technical advice or assistance, please contact our sales office.

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	4500mm
Weight	58.820000
Manufacturer	Keystone
Sap Id	KBX145INS

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