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Keystone BOX/K-200 Solid Wall Box Lintel 3450mm INS

SKU

KBX2345INS

£269.50 £224.58

Product Information

Keystone BOX/K-200 Solid Wall Box Lintel, 3450mm (11ft 4in) length for solid walls 100-215mm thick.
Includes integral insulation for improved thermal performance, reducing heat loss through openings.
Designed for standard load-bearing internal openings in masonry construction.
Perforated sides provide excellent plaster key for a secure finish.
Lintel requires a minimum 150mm bearing at each end, bedded on mortar; propping recommended during construction.

Details

The Keystone BOX/K-200 Solid Wall Box Lintel with insulation is engineered for builders and site managers working on internal openings within solid masonry walls ranging from 100 to 215mm thickness. Its integrated insulation enhances thermal efficiency, making it a smart choice for projects prioritising energy performance without compromising structural integrity. Please note, lintels must be supported with a minimum 150mm bearing at each end and bedded in mortar for correct installation.

Application

This box lintel is widely used to support brick or blockwork above doorways and window openings in solid walls. Its standard duty rating suits typical residential and commercial builds, carrying the full load of wet masonry immediately after installation. The perforated design along the lintel length ensures a strong key for plaster, facilitating a durable and neat finish. Proper end bearing and temporary propping are essential for safe and efficient construction progress.

Dimension

Length: 3450mm (11ft 4in)
Height: 150mm (6in)
Width: 200mm (8in)
Suitable for wall thickness: 100-215mm (4-8½in)

Material

Galvanised steel with integrated thermal insulation

Type

Box lintel, insulated, standard duty

All dimensions are manufactured in 150mm increments. For further technical guidance or project-specific advice, please contact our sales team. Images are for illustration purposes only.

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	3450mm
Weight	48.950000
Manufacturer	Keystone
Sap Id	KBX2345INS

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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