66 Modern Welding Figure 3-39. Slot weld drawing and welding symbol. A—The location of the slot welds and the welding symbol are shown on the assembly drawing. B—Size dimensions for the slot weld may be shown in a detail drawing on the assembly drawing. A See detail B .5 6 4″ 6″ 6″ 1.5″ 7.0″ Detail B B Figure 3-40. Spot welds. A—An electron beam spot weld. Its size at the point of fusion is 2.5mm. Its required strength is 1 kilonewton(kN). The weld is made from the other side. B—A resistance spot weld. Its size is 3/8″ and its strength is 600 pounds. The weld is made from both sides and the symbol straddles the reference line. 2.5mm Point of fusion EBW 1kN 2.5 .38″ .38 600 RSW A B