Quick summary:
- Angle lintels are commonly used in single leaf masonry applications.
- Installation depends on correct bearing, alignment, and support during construction.
- Manufacturer guidance should always be checked for the specific lintel being used.
Angle lintels are typically installed as part of standard masonry construction, but correct installation depends on the wall type, loading conditions, and the manufacturer’s specific requirements. Key factors such as bearing, temporary support, and alignment all affect how the lintel performs once in place.
Rather than following a one-size-fits-all method, installation should always be carried out in line with the relevant product guidance and the details of the build.
Overview of the installation process
In general terms, installing an angle lintel involves forming an opening in the wall, positioning the lintel with the correct bearing at each end, and building masonry above it in a controlled manner.
Although the process may appear straightforward, small differences in setup can affect the final outcome, particularly where loading or wall construction is more complex.
Typical on-site checks before installing an angle lintel
Before installation begins, a number of basic checks are typically carried out on site to ensure the lintel and surrounding construction are suitable. These checks will vary depending on the project and should always be confirmed against manufacturer guidance.
- Opening width confirmed – matches the intended lintel size
- Bearing available – sufficient support at both ends of the lintel
- Correct lintel type – suitable for the wall construction and application
- Wall build-up understood – single leaf vs cavity wall arrangement
- Temporary support planned – propping in place if required
- Level and alignment checked – lintel will sit correctly in position
- Manufacturer guidance reviewed – product-specific requirements understood
Bearing requirements
Angle lintels rely on adequate bearing at each end to transfer loads safely into the surrounding masonry. The required bearing length can vary depending on the product and manufacturer.
Insufficient bearing is one of the most common causes of problems, as it reduces the lintel’s ability to distribute loads correctly.
For this reason, bearing dimensions should always be confirmed against the manufacturer’s technical documentation for the specific lintel being used.
Temporary support during installation
Angle lintels are typically installed as masonry is built up, and temporary support (propping) may be required while the structure is not yet self-supporting.
Without adequate support during construction, the lintel or surrounding masonry may be subjected to loads it is not yet ready to carry.
Some manufacturer guidance specifically states that lintels should be propped during installation, particularly over larger openings or where loading conditions are less straightforward.
Alignment and positioning
Correct alignment helps ensure that loads are transferred evenly across the lintel. This includes positioning the lintel level and ensuring it sits properly within the wall build-up.
Even minor misalignment can affect how loads are distributed, particularly over wider openings or where masonry above is not yet fully bonded.
Typical on-site checks before installing an angle lintel
Before installation begins, a number of basic checks are typically carried out on site to ensure the lintel and surrounding construction are suitable. These checks will vary depending on the project and should always be confirmed against manufacturer guidance.
- Opening width confirmed – matches the intended lintel size
- Bearing available – sufficient support at both ends of the lintel
- Correct lintel type – suitable for the wall construction and application
- Wall build-up understood – single leaf vs cavity wall arrangement
- Temporary support planned – propping in place if required
- Level and alignment checked – lintel will sit correctly in position
- Manufacturer guidance reviewed – product-specific requirements understood
Common mistakes to watch for
- Not allowing sufficient bearing at one or both ends
- Installing without temporary support where it is required
- Using an angle lintel in an application it was not designed for
- Ignoring the manufacturer’s installation guidance
- Assuming all steel lintels are installed in the same way
Choosing the right lintel before installation
Installation issues are often the result of the wrong product being selected in the first place. Even a correctly installed lintel may not perform as expected if it is not suited to the wall type, span, or loading conditions.
Before installation begins, it is important to confirm that the lintel matches the intended application and that the relevant technical information has been reviewed.
You can see our range of angle lintels here to compare available options.
Key takeaway
Installing an angle lintel is not just about placing steel over an opening. Bearing, support during construction, alignment, and correct product selection all play a role in how the lintel performs. Manufacturer guidance should always be followed to ensure the installation is appropriate for the specific project.
Important: This article is intended as general guidance only and does not replace project-specific specification, manufacturer instructions, or professional advice where required.
