Section 1 Longitudinal Strength

103. Calculation of Section Modulus of Athwartship Section

1. The ratios of timbers, structural plywoods and cores of sandwich construction to be reckoned in longitudinal strength are to be as follows.

(1) Pine and lauan -------------

(2) Structural plywood --------

(3) Other core materials ------ the Rules

1.0

0.8

The value obtained by the tests specified in Ch 3, 206. and 209. of

2. In case where the structural plywood reckoned in longitudinal strength are provided joints, the joint length is to be not less than 6 times the thickness as the standard.

with scarf