Table showing the Proportions of Double Riveted Lap Joints for various Thicknesses of Plates. (Plates and Rivets Wrought Iron.)

Thickness of plates 3⁄8 7⁄16 1⁄2 9⁄16 5⁄8 11⁄16 3⁄4 13⁄16 7⁄8 15⁄16 1
Diameter of rivets11⁄16 3⁄413⁄16 7⁄815⁄16 111⁄16 11⁄16 11⁄8 11⁄813⁄16
Pitch of rivets2½25⁄82¾27⁄8 3 31⁄83¼ 33⁄8 3½ 35⁄8 3¾
Distance between rows of rivets11⁄81¼13⁄817⁄1619⁄16 1¾17⁄8 17⁄8115⁄16115⁄16 2
Width of lap3½3¾ 44¼4½ 4¾ 5 5 5¼ 5¼ 5½

Fig. 5.

Exercise 5.—Draw, half size, a plan and section of a double riveted lap joint for plates 7⁄8 inch thick to the dimensions given in the above table.

Exercise 6: Single Riveted Butt Joints.—In fig. 4 are shown single riveted butt joints. One of the sectional views shows a butt joint with one cover plate or butt strap; the other sectional view shows the same joint with two cover plates; the third view is a plan of both arrangements. Draw all these views full size.

Fig. 6.

Exercise 7.—Fig. 5 shows a plan and sectional elevation of the connection of three plates together, which are in the same plane, by means of single riveted butt joints and single cover plates. The butt straps where they overlap are forged so as to fit one another as shown, and thus form a close joint. Draw these views to the scale of 6 inches to a foot.

The plates are 1⁄2 inch thick and the butt straps 9⁄16 inch thick. All other dimensions must be deduced from the table for single riveted lap joints.