Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . th of net section ofplate. 3 X .69029 X 42000 = 86, pounds, strength of threerivets in single shear, 100 X 78750 -^ 103,359 = 7(> percentefficiency of joint. See Fig. British Columbia formula gives the following results:P = Pitch of rivets in ^ Diameter of rivets in = Area of one rivet in square ^ = Number of rivets in one pitch (greatest pitch).Y = 23 for steel rivets and = 28 fo
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . th of net section ofplate. 3 X .69029 X 42000 = 86, pounds, strength of threerivets in single shear, 100 X 78750 -^ 103,359 = 7(> percentefficiency of joint. See Fig. British Columbia formula gives the following results:P = Pitch of rivets in ^ Diameter of rivets in = Area of one rivet in square ^ = Number of rivets in one pitch (greatest pitch).Y = 23 for steel rivets and = 28 for steel rivets and = Thickness of plate n = I for Ian. HOW TO LAY OUT A TUBULAR BOILER 33 C = for double butt strap = Factor of =: Percentage of plate between greatest pitch of * = Percentage of rivet section as compared with solidplate. 100 X (P — D)— = % for iron or steel plates. (Pitch — diameter of rivet hole) X 100 Pitch = % of strength ofplate, at joint,compared withsolid plate. (Area of rivets X number rows of rivets) X 100 Pitch X thickness of plate% of strength of rivets as compared with solid Pig. 3 100 X /^ X A^ X F X C X ^ % for steel plates 4 X y X T X P {P— D) = ( — -9375) 100 =: 3 X 100 = 300.:]00 -^ = 76 % net section plate between X .69029 X 3 X 23 X 4-20 ? = 104% = percentage of strength 4 X 28 X 3-9375 X -4375 . of rivets compared to plate. Note.—F in this example is factor on longitudinal seamonly. The computation, according to the Canadian marine law, isgiven below: Fig. 8 Taking the same example, when we obtain 104 percent withB. C. formula, we find as follows:.69029 X 3 X 100 ^ 120 percent. 3-9375 X -4375 Note.—It will be noticed that the Canadian marine law doesnot take into consideration the factor of safety as is done in theBritish Columbia law. Also in the formula for the percentageof strength of the rivets as compared with the solid plate, noaccoun
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
