It is a very strong joint and is used where the beams need lengthening as in false work or in long ladders and flag poles.
_No.2.A fished joint_, Fig.

264, is made by butting the squared ends of two timbers together and placing short pieces of wood or iron, called fish-plates, over the faces of the timbers and bolting or spiking the whole firmly together.

It is used for joining timbers in the direction of their length, as in boat construction.
_No.

3._ In a _fished joint_, Fig.

264, keys are often inserted between the fish-plate and beam at right angles to the bolts in order to lessen the strain that comes upon the bolts when the joint is subjected to tension.