Page 378 - statbility for masters and mates

366 Ship Stability for Masters and Mates
(d) At Neutral Axis
m 17:25 5:5 12 2:75 24:81cm3 Ay
b 12 cm
qd 30 24:81 5:86t/cm2
254 0:5
F 30 tonnes q F A y
INA 12 12
Fig. 43.8
qmax occurs at Neutral Axis.
Load carried by the Web is 28.9 t when Force F 30 t. Web gives resistance
to shearing stress. Flanges give resistance to Bending stress.
Example 2. Second worked example showing distribution of shear stress `q' (with no ¯anges). (See Figs 43.9 and 43.10.)
Let
INA b
td3 0:5 123
72 cm
4
; q 30 Ay 0:833 A y 72 0:5