Summary

Timber elements can be connected using a wide variety of different connector types, as shown in previous units. This is the first of two units showing examples of different timber structures and the types of connection that are commonly used.

In relation to load transfer, connections mainly have to resist gravitational loads, such as structure self-weight, imposed floor loads and snow. As timber is a lightweight material, however, structures made from timber are vulnerable to wind or earthquake – instantaneous loads which may be larger than the normal gravitational loads.

The net effect may cause load reversal. It is important therefore that wind and uplift effects are taken into account within the design process.

Key Information

Beam connections, truss connections, unbraced frame connections, braced frame connections and panel system connections are usually concealed. Platform frame connections are always concealed.

Round timber connections, lattice connections, arches and portal connections are often exposed.

Braced frames rely on sheathing or diagonal bracing to transfer lateral forces, usually wind load, to the ground.

Arches are the the most efficient form for spanning space. An arch carries much of its permanent load in compression using the whole of the cross-section.

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