Technical Data Sheets
Certifications
General Guidance
L Type Windpost
L Type Windposts are designed for use where higher wind loadings occur, and in cases where cavity widths restrict the use of a C Type windpost. Built into the internal skin of blockwork and bolted to the structure via suitable fixings, L Type posts protrude into the cavity area to provide lateral restraint to masonry panels spanning vertically between floors.
As with all ACS windposts, L Type posts are selected from a design table based on the length, section and loading requirements of your project, often eliminating the need for additional steel or reinforced concrete columns and reducing the time and cost involved in this method of construction.
Technical Data Sheets
Certifications
General Guidance
High Wind Loadings? No Problem
L Type Windposts are installed into a vertical blockwork joint and protrude into the cavity area. WPT1 clip on ties are used on the external leaf, and WPT2 clip in ties on the inner leaf, to transfer loadings back to the structure. Standard sections range from 125 x 70 x 4mm up to 200 x 70 x 5mm, achieving factored loads of up to 24.8kN depending on post height, with parapet post versions also available as fixed base cantilevers up to 2.0m in height.
Simple To Install
All ACS windposts come with site-specific layout and section details for the post, head fixings, base fixings and ties. They’re supplied with a rigid base connection and a separate top cleat, designed with a slotted connection to allow for movement and tolerance. Almost any size can be designed and manufactured beyond our standard range – just share your specific requirements and we’ll put you in touch with our in-house design team.
Want to learn more about our Windposts?
Specifying windposts for a masonry panel? Share your panel height, wind loading and cavity width with our Technical Engineering Team and we’ll confirm the right section, fixings and layout details your project requires.
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Key Specification Details
- Designed for higher wind loadings, and for cavity widths that restrict the use of a C Type windpost
- Installed into a vertical blockwork joint and protruding into the cavity, with WPT1 clip-on ties to the external leaf and WPT2 clip-in ties to the inner leaf transferring loads back to the structure
- Standard sections from 125 x 70 x 4mm up to 200 x 70 x 5mm, with factored loads up to 24.8kN depending on post height
- Designed as simply supported beams to Eurocodes 3 and 6, with maximum deflection of height/360 and maximum stress of 191N/mm² (Grade 304), and ties designed to BS EN 845
- Parapet post versions available, designed as fixed base cantilevers up to 2.0m in height
- Supplied with a rigid base connection and a slotted top cleat for movement and tolerance
- Austenitic stainless steel, or carbon steel where specified, CCPI-assessed, with standard or bespoke designs from our technical team
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CPD Series
Tested, Certified, Trusted
L Type Windposts are designed to Eurocodes 3 & 6, with ties designed to BS EN 845, and have achieved a Code for Construction Product Information (CCPI) mark for clear, accurate product information.
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Technical Data Sheet
The ACS Windposts Technical Data Sheet covers product highlights, product summary, installation guidance, and full design tables for L, C and Spine section windposts and their parapet post variants.
FAQs
When should I specify an L Type windpost instead of a C Type?
L Type is the right choice where wind loadings are higher than a C Type section can accommodate, or where the cavity width itself is too restricted for a C Type windpost to be installed. It’s built into the internal skin of blockwork rather than sitting entirely within the cavity.
