3.8 : 木材用の留め具

In wood structures, fasteners hold components in place. Connection strength mainly depends on direct member bearing.

Different fasteners, like nails, are sharp-pointed metal pins driven into wood with a hammer or a mechanical gun.

A wide range of nail types exist, with different diameters, heads, and lengths.

Face nailing, end nailing, and toe nailing are three techniques used for fastening wood members with nails.

Screws, which are fasteners with spiral threads come in a variety of types, and are installed by applying a twisting motion to embed them into the wood securely.

This action causes the threads to pull the screw firmly into the material it is fastening.

Bolts are placed into predrilled holes using a wrench to turn the nut on the side opposite to the bolt head, and the bolt is tightened and secured in place.

Flat steel washers under the bolt head and nut distribute force over a larger wood area, reducing fiber crushing.

Split-ring connectors, toothed plates, and metal framing devices are also used in wood member connections to serve the purpose of fastening.