,, ( ~ is a mon:: complc. ~ force lbm !'. implc lctllion or comprc~s Iun A com mon example is a bolted !ap joint fn steel plates., produc~ what is called sin2le shear. In reinforced concrete, this is best illustrated by a loaded col­ wnn corbel. Both oxmplcs of sln&fc: shear arc shown in Fig. &-2. Bolted Joint-Single Shear Shear on this face Load Column Column Corbel E!o. 6-2 Exom~ of Single Shoar If a $et of books were carried horiwntal ly as shown in Fig. &-3, they would ha,.., to be squee:ied tighdy togelber or they would tlip and fall. In a beam, cach imaginary vertical slice. (as in the car. e <,fa single book) with a load on t Op tends CO slip down, due to what is called vertical shear. Sot of Books Concrote Beam Fig, 6-3 EX'!ffi PIO of Vertical Shear As shown in Fig. 6-4, if """'111 boards= laid fiat across two supporu and load­ ed. they will bend downward bul will also slip along each olhc:r horizontally. The hori2ootal slippoge is caused by a force known as borlw11tal shear. In the case ofboords, if nails, screws, or lag bolts are installed vertically, they will lt$ist the hori>ooltol shc:ar. l1>o b Ollds will ~>on act as a single w1it, and thus be s:tiffu. Loads ¥ 1111111,1 f Seit of Boards Support Support Fig. 6-4 Example of Horlzontat Shear 6-2 COnavlo Aclnforoit,g Slool lnotltl M Section 609 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 6-9