In wide pieces and for extra strength, as in bridge work, the bolts may be staggered.
_Nos.

4, 5, 6 and 7._ _A scarf or spliced joint_, Fig.

264, is made by joining together with flush surfaces the ends of two timbers in such a way as to enable them to resist compression, as in No.

4; tension, as in No.

5; both, as in No.