Lintels

Frequently Asked Questions – Lintels

What is a lintel used for?

A lintel is a structural component installed above an opening such as a window or door. It supports the masonry and other loads above the opening and transfers those loads into the supporting structure on either side.

What's the difference between a steel lintel and a concrete lintel?

Steel and concrete lintels both provide structural support above openings, but they differ in their construction and suitable applications. Steel lintels are available in different profiles for wall types such as cavity and single-leaf construction, while concrete lintels are commonly specified for a range of masonry applications. The correct choice depends on the wall construction and structural requirements.

What is a cavity lintel?

A cavity lintel is designed for use within cavity wall construction, supporting masonry above an opening while spanning the cavity. Different cavity widths and wall constructions require different lintel specifications, so the lintel should be selected to match the project design.

What is a single-leaf lintel?

A single-leaf lintel is designed to support masonry above an opening in a single-leaf wall construction. County Building Supplies stocks Keystone single-leaf steel lintels in a range of lengths for suitable applications.

How do I know what size lintel I need?

The correct lintel depends on the width of the opening, required end bearing, wall construction, cavity width where applicable, and the loads being supported. The lintel specification should therefore be taken from the project drawings, structural calculations or manufacturer's technical guidance rather than determined by opening width alone.

How much should a lintel overlap an opening?

Lintels require sufficient bearing onto the supporting masonry at each end of the opening. The required bearing varies depending on the lintel, span and loading, so always follow the manufacturer's installation instructions and structural specification for the project.

What is a padstone used for?

A padstone is a high-strength structural component used beneath the end of a beam or other concentrated structural load. It helps distribute the load over a larger area of the supporting masonry. Padstone dimensions and strength should be selected according to the structural design.

Do I need a padstone under a steel beam?

Padstones are commonly specified beneath structural steel beams where concentrated loads need to be distributed into masonry. Whether one is required, along with its size and strength, should be determined by the structural design or engineer's specification.

Can I use any lintel as long as it's the correct length?

No. Length is only one factor when choosing a lintel. Wall construction, cavity width, load, span, masonry and lintel profile can all affect the required specification. Two lintels of the same length may be designed for completely different applications.

Do you stock Keystone steel lintels?

Yes. County Building Supplies stocks a range of Keystone steel lintels, including cavity and single-leaf lintels in various lengths and specifications. Check the individual product information or contact your local branch if you require a particular lintel.

Do you sell concrete lintels and padstones?

Yes. Our lintels range includes steel lintels, concrete lintels and padstones for a variety of building applications. Product sizes and availability may vary by branch, so contact your local County Building Supplies team if you require a particular specification.

Do you deliver lintels?

Yes. County Building Supplies offers local delivery for lintels and other building materials across our trading area. Because lintels can be long and heavy products, delivery options may depend on the product, quantity, location and site access. Contact your nearest branch for more information.