Manitowoc National Crane NBT30H-2 - Page 167

9
National Crane 03-20-2019 Control # 613-06 9-9
NBT30H-2 SERVICE MANUAL CRANE INSTALLATION
to be spaced 127 mm (5 in) apart with welds at an interval of
102 mm (4 in). Do not weld on the flanges.
Where thickness, depth or flange width vary, interpolation
between tables or variables within a given table will provide
the strength for the section.
If you have any questions concerning frame strength or
reinforcing, contact National Crane before proceeding.
Thickness 3/16 in. (4.76 mm)
D in. (mm)
W in. (mm)
2.5 (64) 3 (76) 3.5 (89) 4 (102)
8 (203) 5.3 (87) 6.0 (98) 6.7 (110) 7.5 (123)
in
3
(cm
3
)
9 (229) 6.3 (103) 7.1 (116) 7.9 (130) 8.7 (143)
10 (254) 7.3 (120) 8.2 (134) 9.1 (149) 10.0 (164)
11 (279) 8.4 (138) 9.4 (154) 10.4 (170) 11.4 (187)
12 (305) 9.5 (156) 10.6 (174) 11.7 (192) 12.8 (210)
13 (330) 10.8 (177) 11.9 (195) 13.1 (215) 14.3 (234)
14 (356) 12.0 (197) 13.3 (218) 14.6 (239) 15.9 (261)
15 (381) 13.4 (220) 14.7 (241) 16.1 (264) 17.5 (287)
TABLE A
Section Modulus in
3
(cm
3
)
Thickness 1/4 in. (6.35 mm)
D in. (mm)
W in. (mm)
2.5 (64) 3 (76) 3.5 (89) 4 (102)
8 (203) 6.9 (113) 7.8 (128) 8.8 (144) 9.7 (159)
in
3
(cm
3
)
9 (229) 8.2 (134) 9.2 (151) 10.3 (169) 11.4 (187)
10 (254) 9.5 (156) 10.7 (175) 11.9 (195) 13.1 (215)
11 (279) 11.0 (180) 12.3 (202) 13.6 (223) 14.9 (244)
12 (305) 12.5 (205) 13.9 (228) 15.3 (251) 16.8 (275)
13 (330) 14.1 (231) 15.6 (256) 17.2 (282) 18.8 (308)
14 (356) 15.8 (259) 17.5 (287) 19.1 (313) 20.8 (341)
15 (381) 17.5 (287) 19.3 (316) 21.2 (348) 23.0 (377)
Thickness 5/16 in. (7.94 mm)
D in. (mm)
W in. (mm)
2.5 (64) 3 (76) 3.5 (89) 4 (102)
8 (203) 8.4 (138) 9.5 (156) 10.7 (175) 11.9 (195)
in
3
(cm
3
)
9 (229) 10.0 (164) 11.3 (185) 12.6 (206) 13.9 (228)
10 (254) 11.6 (190) 13.1 (215) 14.6 (239) 16.0 (262)
11 (279) 13.4 (220) 15.0 (246) 16.6 (272) 18.3 (300)
12 (305) 15.3 (251) 17.1 (280) 18.8 (308) 20.6 (338)
13 (330) 17.3 (284) 19.2 (315) 21.1 (346) 23.1 (379)
14 (356) 19.4 (318) 21.4 (351) 23.5 (385) 25.6 (420)
15 (381) 21.6 (354) 23.8 (390) 26.0 (426) 28.3 (464)
Thickness 3/8 in. (9.52 mm)
D in. (mm)
W in. (mm)
2.5 (64) 3 (76) 3.5 (89) 4 (102)
8 (203) 9.8 (161) 11.2 (184) 12.5 (205) 13.9 (228)
in
3
(cm
3
)
9 (229) 11.7 (192) 13.2 (216) 14.8 (243) 16.3 (267)
10 (254) 13.6 (223) 15.4 (252) 17.1 (280) 18.8 (308)
11 (279) 15.7 (257) 17.7 (290) 19.6 (321) 21.5 (352)
12 (305) 18.0 (295) 20.1 (329) 22.2 (364) 24.3 (398)
13 (330) 20.3 (333) 22.6 (370) 24.9 (408) 27.2 (446)
14 (356) 22.8 (374) 25.3 (415) 27.8 (456) 30.3 (497)
15(381) 25.4 (416) 28.1 (461) 30.8 (505) 35.5 (582)
W
D