Pre-cast concrete lintels

Pre-cast concrete lintels

Advantages of pre-cast concrete

  • can be formed into any shape to give maximum strength and certain shapes that are more structurally efficient than rectangles.
  • durability, with guaranteed grade and level of compaction – all moulds are vibrated to control compaction.
  • inherent fire resistance – concrete acts as an insulator, protecting the steel reinforcement. Pre-casting enables the reinforcement to be accurately positioned to ensure the correct cover protection. This is an advantage over pre-stressing – incorrect tensioning, mould movement, or miss-alignment of the strand positions can affect not only one lintel, but an entire line.
  • ensures a naturally better finish because the inner surfaces of the moulds are kept in excellent condition. A further advantage of good clean moulds is that they do not cause grout loss or staining that can be evident in mass produced concrete lintels.


All King Stone’s concrete lintels are wet pre-cast products, using a 55 N/mm² mix. The mix includes an additive to give a very low water absorption rate, which makes the concrete lintels ideal for use below ground.

Any concrete section can be designed and manufactured up to 6000 mm length and 4000 mm width and a maximum weight of 4 tonnes. (Increased section weights would be subject to a crane charge.) Radius concrete lintels are available upon request and details, effects, and colours can be incorporated if required.

King Stone’s concrete lintels can accept fixings provided the reinforcement is undamaged during drilling. However, King Stone can insert any type of fixing during the casting process to prevent the need to drill afterwards.

All King Stone concrete lintels are cast with lifting sockets in place to aid safe handling and orientation on site. They can also be labeled during manufacture with door or opening references – this service is unique to King Stone Products and ensures that all concrete lintels can be built in correctly.

King Stone can cast inserts, channels, uni-struts, feature details, lettering and any other detail you require into any section to make your item bespoke to your building.

Pre-cast concrete lintel ranges

Standard Range

A cost effective solution for all major construction requirements, these units are available in a variety of sizes for all block and wall constructions. All can be used below ground and have a 30 minute fire resistance. King Stone can manufacture any length you require.

See load tables.

Fairfaced Range

King Stone’s Fairfaced Range is hand finished to ensure a flawless appearance with no air holes on the surface, and guaranteed consistency of colour and texture. This Range of concrete lintels has the same structural load capabilities as King Stone’s standard range, but the hand finishing of every unit makes it unique to King Stone Products. All can be used below ground and have a 30 minute fire resistance. King Stone can manufacture any length you require.

See load tables.

Fairfaced Fire Range

King Stone’s Fairfaced Fire concrete lintels form the most popular of the King Stone ranges, and are some of the strongest concrete lintels on the market. They are cast using a Class 1 Limestone aggregate which gives them maximum strength and helps towards their fire rating. Because of this, they are a direct comparison to, if not better than, other manufacturers’ lintels that are promoted as high strength. King Stone’s Fairfaced Fire concrete lintels also comply with Eurocode 2.

Again, King Stone can manufacture any length and section size you require, and all can be used below ground. All Fairfaced Fire concrete lintels come with a standard 60 minute fire rating. However King Stone has developed further one-part mixes to achieve 90 minute and even 120 minute fire ratings.

All the Fairfaced Fire concrete lintels can be cast in any of King Stone’s colours (except the 120 minute fire rated concrete lintels, which are only available in white or grey): they are all hand finished to remove surface air holes, giving them a completely smooth appearance.

See load tables.

Super Fire Rated Range

The Super Fire Rated Range is the latest range of concrete lintels that King Stone Products has introduced to meet industry requirements and ensure that King Stone is at the cutting edge of concrete lintel technology. These are the first concrete lintels to achieve 240 minute fire rating on varying sections without the need for a separate protective outer coating: documentation from a professional fire testing organisation is available to validate this performance.

King Stone’s Super Fire Rated concrete lintels are cast from a newly developed material that has enhanced thermal performance but maintains all the characteristics of normal concrete with a density of 2000 kg/m³. This revolutionary material, exclusive to King Stone, has a very low cement content (only 2%), and emits very little C02 during manufacture. The concrete lintels made from this material have flawless surfaces, are fairfaced in appearance, and do not require separate protective outer coating. This reduces the risk of damage in handling and avoids the inconvenience and costs of on-site repairs to damaged lintel coatings. King Stone’s material for the Super Fire Rated Range is simply a one-part mix, as with all King Stone’s other concrete lintels. Completely unique!

In addition, a substantial number of the material’s ingredients come from either renewable sources or recycled products, giving the Super Fire Rated concrete lintels unprecedented green credentials. Coupled with a 4-hour fire rated resistance – guaranteed by an independent fire testing organisation – these are the ultimate fire rated concrete lintels.

This Range of concrete lintels is available in the same depths and will bear the same loadings as King Stone’s standard range. They can also be used below ground and can be manufactured to any length you require.

See load tables.

Resistant Range

King Stone’s Resistant Range of concrete lintels is suitable for sites that have aggressive ground conditions, constant waste, water flow, or high levels of airborne chemicals. King Stone can mix a grade of concrete to withstand most aggressive conditions, and will guarantee that there is adequate cover to all sides of the concrete lintel reinforcement. There is no need for any additional process on site.


King Stone is extremely flexible, and should you have requirements unmet by King Stone’s current ranges, bespoke concrete lintels or concrete sections can be manufactured. Structural calculations for specials can easily be provided for your CDM file to satisfy local authorities or structural engineers.

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