Structural connections include nails, screws, bolts, coachscrews, rivets, pins, dowels, epoxied rods, glues and other structural connectors including ply gussets, metal plate fixings, and nail-on plates.
A key part of the design of a timber structure is the connections. A large portion of the design effort goes into designing and detailing the connections throughout a structure.
One of the reasons for the complexity in designing the connections is the anisotropic nature of timber, ie the structural properties are different along different axes.
Another reason is the variable nature of timber with variations in species, grade and individual sticks within a grade resulting in a large variation in the structural properties.
Timber fixing technology has developed over thousands of years, resulting in a wide range of fixings available to the designer. Selection of appropriate fixings depends on factors such as the environment, use, loading and aesthetic requirements.
Edward Cullinan Architects