TABLE XIII. SAFE LOADS UNIFORMLY DISTRIBUTED IN TONS OF 2000 POUNDS. American Standard and Special Channels These safe loads include the weight of the channel and are figured for a maximum fibre stress of 16,000 pounds per sq: in. and safe deflection. When using safe loads above the dotted lines, the web must be stiffened within every 25 times the width of the flange to prevent web crippling. For safe loads below the heavy lines, the deflections will exceed the allowable limit for plastered ceilings=1/360 span. 7 8 9 6 x4 x1 6 x4 x4 3.70 6 x4 x2 2.57 6 x4 x% 6 x32x1 4.64 6 x32x4 4.07 3.61 6 x32x2 11.3 5.65 4.52 3.76 3.23 7.03 2.82 2.51 TABLE XIV. SAFE LOADS UNIFORMLY DISTRIBUTED IN TONS OF 2000 POUNDS. For Angles With Unequal Legs Placed With the Longer Leg Vertical 5 These safe loads include the weight of the angles and are figured for a maximum fibre stress of 16,000 lbs. per sq. in. and safe deflection. For safe loads to the right of the vertical lines, the deflections will exceed the allowable limit for plastered ceilings=1/360 span. Span in ft. 2 3 21.39 14.26 10.69 8.55 7.13 6.11 5.35 4.75 16.66 11.11 8.33 6.66 5.55 4.76 4.16 11.56 7.75 5.78 4.62 3.85 3.30 2.89 8.85 5.90 4.43 3.54 2.95 2.53 2.21 1.97 20.88 13.92 10.44 8.35 6.96 5.97 5.22 6.27 10.85 8.13 6.51 5.42 4.65 5 x4 x% 6.24 4.16 3.12 2.50 2.08 1.78 1.56 11.80 7.10 5.70 4.56 3.80 3.26 2.85 7.96 5.31 3.98 3.13 2.65 2.27 1.99 6.12 4.08 3.06 2.44 2.04 1.75 1.03 1.36 1.22 1.11 5.16 3.44 2.58 2.07 1.73 1.48 1.29 1.15 1.04 11.09 7.39 5.55 4.44 3.70 3.17 2.77 2.46 2.22 7.75 5.17 3.88 3.10 2.58 2.21 1.94 1.72 1.55 5.96 3.97 2.98 2.38 1.98 1.70 1.49 1.32 1.19 1.08 5.04 3.36 2.52 2.02 1.68 1.44 1.26 1.12 1.01 0.91 6.33 4.22 3.16 2.53 2.61 1.81 4.87 3.25 2.44 1.95 1.62 1.39 5.16 3.44 2.58 2.06 1.72 3.36 2.24 1.68 1.34 1.12 7.15 4.76 3.57 2.86 2.38 5.03 3.35 2.52 2.01 1.68 1.44 1.26 1.12 3.89 2.59 1.94 1.55 1.29 1.11 0.97 0.86 0.78 3.29 2.19 1.64 1.31 1.09 0.94 0.82 0.73 0.66 1.39 1.25 1.13 1.04 0.96 0.89 0.83 0.78 0.73 0.69 2.53 2.28 2.07 1.90 1.75 1.63 1.52 1.42 1.34 1.26 316x3 31x3 x3 3.00 32x3 X 2 56 5.48 3.65 2.74 2.19 1.82 1.56 1.37 2.00 1.50 1.20 1.00 0.86 0.75 1.71 1.28 1.02 0.85 0.73 0.64 31%2x2 x% 4.37 2.91 32x2 X4 1.94 1.29 3 x22x2 3 x22x4 22x2 x2 212x2 x 22x12x 22x12x14 2.18 1.75 1.46 1.25 1.09 0.97 0.77 0.64 055 0.48 1.39 1.11 0.92 0.79 0.69 | 0.61 075 0.60 0.50 0.43 0.37 0.33 0.30 0.93 0.75 0.62 0.53 0.47 0.77 0.52 0.39 0.31 0.26 0.22 0.19 1.58 1.05 0.79 0.63 0.52 0.45 0.39 0.64 0.97 0.87 0.79 0.73 0.67 0 62 TABLE XV. SAFE LOADS UNIFORMLY DISTRIBUTED IN TONS OF 2000 POUNDS. American Standard and Special Channels Set Flatwise These safe loads include the weight of the channel and are figured for a maximum fibre stress of 16,000 pounds per sq. in. 3 61 1.55 1.70 2.41 2.45 2.61 2.76 2.93 3.10 1.33 1.45 5.42 2.31 2.54 2.78 3.01 3.28 1.56 1.78 2.00 4.35 1.86 2.02 2.23 2.42 2.62 1.25 1.43 1.60 1.85 2.01 2.18 1.04 1.19 1.33 1.69 1.73 1.87 2.11 2.14 2.28 2.42 256 2.71 1.16 1.87 1.91 2.01 2.14 2.28 2.41 1.03 1.69 1.72 183 1.93 2.05 2.17 .93 1.53 1.56 1.66 1.76 1.87 1.97 1.41 1.43 1.52 1.61 1.71 1.30 1.32 1.40 1.49 1.58 1.20 1.23 1.30 1.38 1.46 1.12 1.14 1.22 1.29 1.37 .89 1.02 1.14 1.27 1.42 .74 .78 .91 1.04 1.27 1.39 1.51 1.64 .78 .89 1.00 1.11 1.24 .65 .79 .91 1.13 1.24 1.34 1.45 .69 .79 ..89 .99 1.11 1.02 .70 .81 1.11 1.21 1.31 .71 .80 .89 1.00 .63 85 .73 .92 1.01 1.10 1.19 .65 .72 .81 .90 1.81 .78 .58 .66 .93 1.01 1.09 .52 .66 .74 .83 .43 .53 1.67 .60 .72 .86 .93 1.01 .48 .61 .68 .76 .40 1 55 .42 .49 .56 66 .80 .86 .93 .44 .51 .57 .63 .71 1.44 .39 .45 .62 .68 .74 .80 .87 .41 .47 .53 .59 .65 .34 .37 .42 .48 TABLE XVI. SAFE LOADS IN TONS OF 2000 POUNDS FOR C ST IRON COLUMNS WITH SQUARE ENDS. In accordance with the New York Building Code. Columns less than 5 ins. exterior diameter and less than 4 in. thick are not allowed in New York. 68.7 76.1 123 0 82.7 134 0 60.6 100.3 22.1 33.5 31.9 30.3 28.7 27.1 25.6 24.0 5x5 28.1 43.8 42.0 40.3 38.5 36.8 35.0 33.2 1 11/8 87.0 143.0 78.5 129.0 126.0 122.9 119.8 116.6 139.6 136.0 132.4 128.9 113 3 110.2 9x9 1 100.0 167.0 163.2 159.9 156.2 152.9 149.2 146.0 125.1 121.8 9x9 11% 110.7 184.6 180.4 176.8 172.8 168.9 164.9 161.0 98.0 162.8 159.1 155.5 152.0 148.4 145.0 142.9 10x10 11x11 11/4 256.0 249.2 121.1 201.5 197.0 192.8 227.4 223.6 219.9 215.8 211.5 244.4 240 2 236 0 231.6 12x12 1 137.5 234.5 231.0 227.4 224.0 220.6 217.0 213.5 TABLE XVII. MAXIMUM UNSUPPORTED LENGTHS FOR STANDARD SHAPES USED AS STRUTS. Figured in accordance with the New York Building Code. The maximum length to the nearest inch does not exceed 120 times the least radius of gyration of the section. In all cases is given the allowable load for columns with square ends and corresponding to the unsupported length. |
