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Keystone BOX/K-100 Solid Wall Box Lintel 3450mm INS

SKU

KBX1345INS

£194.70 £162.25

Product Information

Keystone BOX/K-100 Solid Wall Box Lintel, length 3450mm (11ft 4in) with insulation for improved thermal efficiency
Designed for solid walls between 100mm and 215mm thick, ideal for internal openings
Standard duty lintel supports full load of wet masonry immediately after installation
Requires minimum 150mm bearing each side on mortar for secure fitting
Propping recommended for faster, safer construction progress

Details

The Keystone BOX/K-100 Solid Wall Box Lintel 3450mm INS is engineered for builders and contractors needing a reliable lintel solution for solid walls ranging from 100mm to 215mm thickness. Featuring built-in insulation, this lintel enhances thermal performance while providing the strength required for standard load-bearing applications. Please note, lintels must be bedded on mortar with adequate end bearing, and propping is advised to ensure safe installation.

Application

This insulated box lintel is typically used to span internal openings such as doorways and windows within solid masonry walls, supporting the full wet masonry load from above. Its robust design is suited to standard duty load conditions commonly encountered on residential and commercial construction sites. The integral insulation helps meet building regulations for energy efficiency without compromising structural integrity.

Dimension

Length: 3450mm (11ft 4in)
Height: 215mm
Width: 95mm
Suitable for wall thickness: 100mm to 215mm

Material

Steel box lintel with integrated insulation layer
Manufactured to provide structural support and thermal efficiency

Type

Box lintel designed for solid wall applications
Standard duty load-bearing lintel with insulation (INS variant)

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	3450mm
Weight	45.090000
Manufacturer	Keystone
Sap Id	KBX1345INS

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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