ข้อต่อสามทางลด-หนา (ฟ้า)

20×18 (3/4"x1/2"), 25×18 (1"x1/2"), 25×20 (1"x3/4"), 35×25 (1 1/ 4"x1'), 40×18 (1 1/2"x1/2"), 40×20 (1 1/2"x3/4"), 40×25 (1 1/2"x1"), 40×35 (1 1/2"x1 1/4"), 55×18 (2"x1/2"), 55×20 (2"x3/ 4"), 55×25 (2"x1"), 55×35 (2"x1 1/ 4'), 55×40 (2"x1 1/2"), 65×20 (2 1/2"x3/ 4"), 65×25 (2 1/2"x1'), 65×40 (2 1/2"x1 1/2"), 65×55 (2 1/2"x2"), 80×18 (3"x1/2"), 80×20 (3"x3/ 4"), 80×25 (3"x1"), 80×40 (3"x1 1/2"), 80×55 (3"x2"), 80×65 (3"x2 1/2"), 100×20 (4"x3/ 4"), 100×25 (4"x1"), 100×40 (4"x1 1/2"), 100×55 (4"x2"), 100×65 (4"x2 1/2"), 100×80 (4"x3"), 125×100 (5"x4"), 150×55 (6"x2"), 150×80 (6"x3"), 150×100 (6"x4"), 150×125 (6"x5"), 200×100 (8"x4"), 200×150 (8"x6"), 250×200 (10"x8")