What brings you to SPEC Toolbox?

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I Specify Products

Engineer, architect, or designer working with mass timber. Free to use.

I Supply Products

Manufacturer or supplier who wants their products specified by engineers.

Eliminate Design Bottlenecks for Low-Carbon Construction

Join over 6,000 structural engineers globally. Design CLT, Glulam, and connections with transparent, code-compliant calculations for NDS, Eurocode, and AS/NZS standards.

Structural Engineer

SPEC toolbox has helped simplify the organization and transparency of engineering calculations by providing a ‘once stop shop’ for all relevant designs. I like the explanations attached to some of the calculations which is a big bonus for the younger engineers learning the ropes.

Matthew Burke

Structural Engineer