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Reg. 194
FLAT PLATES


Flat plates supported by stays and nuts and large washers or strips or doublings

a) Where the plates are supported by stays passing through them and are fitted with nuts inside and washers and nuts outside, the diameter of the washers being at least 3 ½ times that of the stay and their thickness at least two-thirds, that of the plate, but not greater than that of the plate, the maximum working pressure shall be : -
W. P. = 100 [ ( t - 1 )2 + .15 t12 ] Eqn.(29)
A2 + B2
b) where the washers have a diameter of at least two-thirds of the pitch of the stays and a thickness of at least two-thirds of the thickness of the plate, but not greater that that of the plate, and are riveted to the plate in an efficient manner, the, maximum working pressure shall be : -
W. P. = 100 [ ( t – 1 )2 + .35 t12 ] Eqn.(30)
A2 + B2
c) Where the plate is stiffened by strips at least two thirds of the pitch of the stays in breadth which have a thickness of at least two-thirds of that of the plate but not greater than that of the plate, and are riveted to the plate in an efficient manner, the maximum working pressure shall be : -
W. P. = 100 [ ( t - 1 )2 + .55 t12 ] Eqn.(31)
A2 + B2
d) Where the plates are fitted with doubling plates having a thickness of at least two-thirds of that of the plate but not greater that that of the plate, and are riveted to them in an efficient manner, the maximum working pressure shall be : -
W. P. = 100 [ ( t - 1 )2 + .85 t12 ) ] Eqn.(32)
A2 + B2
 
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