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Published by Thanawut Theerakiatkun, 2020-06-17 02:43:31

4.MechanicsofMaterials

4.MechanicsofMaterials

คณุ สมบัตขิ องหนาตดั เหล็กร

ชอื่ ขนาด น้ําหนัก d bf ความหนา รศั มี พนื้ ท
สว นโคง

tw tf r c
2
kg/m mm mm mm mm mm
8 10
100× 100 17.2 100 100 6

100×50 9.3 100 50 5 7 8 1

รูปตวั W ชนดิ รดี รอ น (ตอ) A- 19

ท่หี นาตั Moment of Inertia Section Modulus Radius of Gyration

Ix Iy S x S y rx ry
A cm4 cm4 cm3 cm3 cm cm
383 134 4.18 2.47 76.5 26.7
cm2 187 14.8 3.98 1.12 37.5 5.91
21.90

11.85

A- 20

ภาคผนวกที่ 4

คณุ สมบัตหิ นาตดั ของชิน้ สว นของโครงสรางไม

y

xh

b

Axis x Axis y

Nominal Net Moment of Section modulus Moment of Section modulus
dimensions dimensions
Area inertia Sx = bh2 inertia Sy = hb 2
b×h b×h 6 6
A = bh bh3 hb3
Ix = 12 Iy = 12
in.2
in. in. 5.25 in.4 in.3 in.4 in.3
2x4 1.5 x 3.5 8.25 5.36 3.06 0.98 1.31
2x6 1.5 x 5.5 10.88
2x8 1.5 x 7.25 13.88 20.80 7.56 1.55 2.06
2 x 10 1.5 x 9.25 16.88
2 x 12 1.5 x 11.25 8.75 47.63 13.14 2.04 2.72
13.75
3x4 2.5 x 3.5 18.13 98.93 21.39 2.60 3.47
3x6 2.5 x 5.5 23.13
3x8 2.5 x 7.25 28.13 177.98 31.64 3.16 4.22
3 x 10 2.5 x 9.25 12.25
3 x 12 2.5 x 11.25 19.25 8.93 5.10 4.56 3.65
25.38
4x4 3.5 x 3.5 32.38 34.66 12.60 7.16 5.73
4x6 3.5 x 5.5 39.38
4x8 3.5 x 7.25 30.25 79.39 21.90 9.44 7.55
4 x 10 3.5 x 9.25 41.25
4 x 12 3.5 x 11.25 52.25 164.89 36.65 12.04 9.64
63.25
6x6 5.5 x 5.5 56.25 296.63 52.73 14.65 11.72
6x8 5.5 x 7.5 71.25
6 x 10 5.5 x 9.5 86.25 12.51 7.15 12.51 7.15
6 x 12 5.5 x 11.5
48.53 17.65 19.65 11.23
8x8 7.5 x 7.5
8 x 10 7.5 x 9.5 111.15 30.66 25.90 14.80
8 x 12 7.5 x 11.5
230.84 49.91 33.05 18.89

415.28 73.83 40.20 22.97

76.3 27.7 76.3 27.7

193.4 51.6 104.0 37.8

393.0 82.7 131.7 47.9

697.1 121.2 159.4 58.0

263.7 70.3 263.7 70.3

535.9 112.8 334.0 89.1

950.5 165.3 404.3 107.8




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