SIHGA S3 Calculations Software: A Powerful, Free Design Tool for Engineers and Timber Professionals

When designing timber structures, every fixing matters. Selecting the correct screw, connector or reinforcement detail isn’t simply about choosing a product from a catalogue, it’s about ensuring structural performance, compliance and efficiency.

That’s why SIHGA has developed its S3 Calculation Software: a powerful, free design tool that enables engineers, designers and timber professionals to calculate and verify timber connections quickly and accurately.

Designed for modern timber construction

Installing large screws can be challenging, especially when working with dense materials or demanding structural applications. GoFix® ESH acts as a relAs timber construction continues to grow across the UK, structural engineers are increasingly required to produce accurate calculations for a wide range of timber connections while working to tight project deadlines.

The SIHGA S3 software has been developed specifically to simplify this process. Rather than relying on manual calculations or generic design methods, the software allows users to design and verify connections using SIHGA’s tested fixing systems and design values. It incorporates multiple design modules covering common timber connection scenarios and produces detailed calculation reports to support project documentation.

Whether you’re designing:

• Glulam beam connections
• CLT structures
• Timber frame buildings
• Reinforced timber members
• Hybrid timber structures

S3 helps ensure the correct fixing solution is selected with confidence.

More than just a calculator

One of theThe latest version of S3 is far more than a simple connection calculator.

Key features include:

• Multiple timber connection design modules
• Detailed calculation reports and design evidence
• 3D visualisation of connection details
• Project saving and editing
• Offline operation once installed
• Multi-language support
• National Annex compatibility for several European design standards.

Having the software installed locally also means calculations can be carried out on-site or in locations where internet access is limited.

Helping engineers work faster

Designing timber connections manually can be time-consuming, particularly when several design iterations are required.

S3 streamlines the process by:

• Reducing calculation time
• Minimising the risk of manual errors
• Providing consistent design outputs
• Producing professional calculation reports
• Allowing projects to be revisited and amended without starting again

This enables engineers to spend more time designing structures and less time producing repetitive calculations.

Integrated with SIHGA products

One of the biggest advantages of the software is its direct integration with SIHGA’s engineered fixing systems.

The software includes design data for numerous SIHGA products, allowing engineers to specify fixings with confidence while ensuring calculations are based on approved product performance and technical data. SIHGA also provides additional digital planning tools for specific applications such as façade fixings, decking, timber-concrete composite design and specialist connection design.

Supporting better timber engineering

Modern timber construction demands precision.

Whether working on schools, residential developments, commercial buildings or mass timber projects, designers need reliable information that can be trusted throughout the design process.

SIHGA’s calculation software provides:

• Increased design confidence
• Faster project delivery
• Verified engineering calculations
• Improved documentation for clients and building control
• A straightforward route from design to specification

Available free of charge

Perhaps the best feature of all is that SIHGA’s S3 Calculation Software is available free of charge to registered users.

Combined with SIHGA UK’s technical support, product expertise and growing range of engineered timber fixing solutions, it provides designers with an invaluable resource for delivering safer, more efficient timber structures.

Speak to SIHGA UK

If you’d like to learn more about the S3 Calculation Software or discuss the most suitable fixing solution for your next timber project, get in touch with the SIHGA UK technical team.

We’re here to help with product selection, connection design, technical guidance and CPD presentations, helping you design timber structures with confidence from concept through to construction.