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I-Beam and Posi Joist Solutions for Floors
Engineered Timber I-Beam Joists
I-Beam Joists, also known as engineered joists, are precision-manufactured timber structural members designed to deliver exceptional strength, dimensional stability, and ease of installation across floor, roof, and timber frame applications. Their consistent performance and lightweight construction make them an efficient alternative to traditional solid timber joists.
Harlow Timber Engineering supplies a complete range of I-Beam components and accessories, supporting projects from initial design and specification through to delivery. We also offer comprehensive installation training for contractors and self-builders who want to gain confidence in correctly installing our engineered timber systems.
Enquire now
Using STEICO I-Beam Systems, the market leading product
STEICO I-Beam Joists are high-performance engineered timber joists, combining laminated veneer lumber (LVL) flanges with a natural wood fibreboard web to create a lightweight yet exceptionally strong structural solution. This engineered construction delivers excellent load-bearing capacity, outstanding dimensional stability, and reduced thermal bridging compared to traditional solid timber joists.
Designed for ease of handling and on-site installation, STEICO I-Beams are simple to cut and adapt, helping to speed up construction without compromising structural integrity. Harlow Timber Engineering stocks the full STEICO I-Beam range and provides comprehensive design support, technical documentation, and project-specific kit supply to ensure each system is correctly specified and efficiently delivered.
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Designed for long spans
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Fast installation
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Easy services integration
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Supplied made-to-measure
What is STEICO I-Beam LVL?
STEICO I-Beam LVL (Laminated Veneer Lumber) is a high-performance engineered timber made by bonding layers of softwood veneer. It offers excellent strength, stability, and dimensional accuracy, making it ideal for structural I-Beam joists and floor systems with minimal movement over time.
Posi Joists
Posi Joists are precision-engineered timber joists featuring lightweight timber top and bottom chords connected by a galvanised steel open web. This innovative open-web design delivers an excellent strength-to-weight ratio while allowing longer spans and reduced material use compared to traditional solid timber joists. Suitable for both floor and roof applications, Posi Joists offer exceptional versatility, dimensional stability, and consistent performance in modern construction. Posi Joists are supplied made-to-measure, with full design, engineering, and technical support provided by Harlow Timber Engineering to ensure accurate specification and efficient installation on site.
Flooring & Ironmongery
To complete both I-Beam and Posi-Joist systems, Harlow Timber Engineering supplies a full range of compatible flooring and ironmongery. Flooring options include EGGER Peel Clean and Protect boards, offering short-term weather protection during installation, and Norboard CaberDek for durable structural floors. Standard board sizes are matched to joist layouts, with suitable adhesives available. We also stock certified joist hangers and fixings from leading manufacturers, ensuring safe, compliant installation supplied as a complete kit per plot or project.
As the UK’s largest supplier of STEICO I-Beams, we provide precision-engineered joist solutions for reliable, high-performance floors and roofs.
Ready to discuss your project?
Whether it’s your first project or your dream forever home, our team supports self-builders with expert advice, clear designs and high-quality timber systems. No project is too big or too small — and self-builds are always welcome.
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Family Self-Build in Rural Leicestershire
Design guidance and supply of trusses and joists simplified the self-build journey. The homeowner benefited from reduced costs, a smoother process, and a high-quality finish.
Read the Case Study
150 New Homes for a National Housebuilder
Prefabricated trusses supplied for rapid installation, ensuring consistent quality across every plot. The approach cut build times, reduced site labour, and supported efficient large-scale delivery.
Read the Case Study
Custom Curved Roof Design for a Contemporary Barn
Bespoke engineered trusses shaped to achieve a striking curved roof with precision. The result combined architectural impact with a smooth, efficient installation process.
Read the Case StudyAbout Joists
I-Beam and Posi Joist Solutions for Floors
Engineered Timber I-Beam Joists
I-Beam Joists, also known as engineered joists, are precision-manufactured timber structural members designed to deliver exceptional strength, dimensional stability, and ease of installation across floor, roof, and timber frame applications. Their consistent performance and lightweight construction make them an efficient alternative to traditional solid timber joists.
Harlow Timber Engineering supplies a complete range of I-Beam components and accessories, supporting projects from initial design and specification through to delivery. We also offer comprehensive installation training for contractors and self-builders who want to gain confidence in correctly installing our engineered timber systems.
Enquire nowUsing STEICO I-Beam Systems, the market leading product
STEICO I-Beam Joists are high-performance engineered timber joists, combining laminated veneer lumber (LVL) flanges with a natural wood fibreboard web to create a lightweight yet exceptionally strong structural solution. This engineered construction delivers excellent load-bearing capacity, outstanding dimensional stability, and reduced thermal bridging compared to traditional solid timber joists.
Designed for ease of handling and on-site installation, STEICO I-Beams are simple to cut and adapt, helping to speed up construction without compromising structural integrity. Harlow Timber Engineering stocks the full STEICO I-Beam range and provides comprehensive design support, technical documentation, and project-specific kit supply to ensure each system is correctly specified and efficiently delivered.
-
Designed for long spans
-
Fast installation
-
Easy services integration
-
Supplied made-to-measure
What is STEICO I-Beam LVL?
STEICO I-Beam LVL (Laminated Veneer Lumber) is a high-performance engineered timber made by bonding layers of softwood veneer. It offers excellent strength, stability, and dimensional accuracy, making it ideal for structural I-Beam joists and floor systems with minimal movement over time.
Posi Joists
Posi Joists are precision-engineered timber joists featuring lightweight timber top and bottom chords connected by a galvanised steel open web. This innovative open-web design delivers an excellent strength-to-weight ratio while allowing longer spans and reduced material use compared to traditional solid timber joists. Suitable for both floor and roof applications, Posi Joists offer exceptional versatility, dimensional stability, and consistent performance in modern construction. Posi Joists are supplied made-to-measure, with full design, engineering, and technical support provided by Harlow Timber Engineering to ensure accurate specification and efficient installation on site.
Flooring & Ironmongery
To complete both I-Beam and Posi-Joist systems, Harlow Timber Engineering supplies a full range of compatible flooring and ironmongery. Flooring options include EGGER Peel Clean and Protect boards, offering short-term weather protection during installation, and Norboard CaberDek for durable structural floors. Standard board sizes are matched to joist layouts, with suitable adhesives available. We also stock certified joist hangers and fixings from leading manufacturers, ensuring safe, compliant installation supplied as a complete kit per plot or project.