ข้อต่อตรงลด-หนา (ฟ้า)

20×18 (3/4"x1/2"), 25×18 (1"x1 /2"), 25×20 (1"x3/4"), 35×18 (1 1/4"x1/2"), 35×20 (1 1/4"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"), 80×25 (3"x1"), 80×35 (3"x1 1/4"), 80×40 (3"x1 1/2"), 80×55 (3"x2"), 80×65 (3"x2 1/2"), 100×40 (4"x1 1/2"), 100×55 (4"x2"), 100×65 (4"x2 1/2"), 100×80 (4"x3"), 150×80 (6"x3"), 150×100 (6"x4")