( + )  M 1 = 0 –21,120 lb(12 ft) + R Y2 (24 ft) = 0 R Y2 (24 ft) = 253,440 lb-ft R Y2 = 10,560 lb ( +)  F Y = 0 R Y1 + R Y2 – 21,120 lb = 0 R Y1 + 1