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Keystone BOX/K-200 Solid Wall Box Lintel 3300mm INS

SKU

KBX233INS

£247.50 £206.25

Product Information

Keystone BOX/K-200 Solid Wall Box Lintel with insulation – 3300mm (10ft 10in) length.
Designed for 200mm (7.9in) wide solid walls, supporting standard loads over internal openings.
Built-in insulation improves thermal efficiency, ideal for energy-conscious builds.
Perforated design provides a strong plaster key for seamless finishing.
Minimum 150mm (6in) bearing required each end; lintel must be bedded on mortar and propped during construction.

Details

The Keystone BOX/K-200 Solid Wall Box Lintel 3300mm INS is a specialist structural lintel designed for builders and contractors working with 200mm solid masonry walls. Featuring integrated insulation, this lintel not only carries standard loads reliably but also enhances thermal performance — a smart choice for projects where energy efficiency matters. Please note that the lintel requires a minimum end bearing of 150mm and should be bedded on mortar and supported with props during installation.

Application

This insulated box lintel is commonly used to span internal openings such as doorways and windows in solid masonry walls between 100mm and 215mm thick. Its robust construction allows it to carry the full load of wet masonry immediately after installation, helping maintain build speed on site. The perforated surface creates an effective plaster key, ensuring a secure and clean finish once plastered.

Dimension

Length: 3300mm (10ft 10in)
Height: 150mm (5.9in)
Width: 200mm (7.9in)
Suitable for solid wall thicknesses from 100mm up to 215mm

Material

Steel with integrated insulation for improved thermal performance

Type

Box lintel - standard duty for solid masonry walls

All Keystone Box Lintels are manufactured in 150mm increments. For further technical guidance or bespoke requirements, please contact our sales team.

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	3300mm
Weight	46.820000
Manufacturer	Keystone
Sap Id	KBX233INS

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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