New Zealand Gazette – 1935 – No. 65

Page 2535

✨ Engineering Tables



SEPT. 6.] THE NEW ZEALAND GAZETTE. 2535

TABLE X.—BARE GALVANIZED IRON.

Wind, 18 lb. per square foot of diametral plane.

Constants.—Coefficient of thermal expansion = 6·8 × 10⁻⁶ per degree Fahrenheit; maximum allowable stress = 22,500 lb. per square inch; modulus of elasticity = 26 × 10⁶ lb. per square inch.

1/160 in. (8 S.W.G.).

Constants.—Area, 0·02011 sq. in.; diameter, 0·160 in.; loading factor, 3·670; maximum tension in conductor, 453 lb.; weight, 0·068 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20. 40. 60. 80. 100.
Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag.
Ft. lb. Ft.in. lb. Ft.in. lb. Ft.in. lb. Ft.in. lb. Ft.in.
180 .. 280 1 0 230 1 2 190 1 5 158 1 9 134 2 1
220 .. 227 1 10 198 2 2 166 2 6 147 2 10 132 3 2
260 .. 192 3 0 171 3 4 154 3 9 140 4 1 130 4 5
300 .. 171 4 6 157 4 11 145 5 3 136 5 7 128 6 0
340 .. 158 6 3 148 6 8 140 7 0 133 7 4 127 7 9
380 .. 149 8 3 143 8 7 137 8 11 132 9 4 127 9 8

TABLE XI.—BARE GALVANIZED STEEL, 34,000 lb. BASIS.

Wind, 18 lb. per square foot of diametral plane.

Constants.—Coefficient of thermal expansion = 6·8 × 10⁻⁶ per degree Fahrenheit; maximum allowable stress = 34,000 lb. per square inch; modulus of elasticity = 28 × 10⁶ lb. per square inch.

Note.—This table is for use with conductors having a breaking-strength not less than that stated for each size of conductor.

34,000 lb. BASIS.

(A.) 1/160 in. (8 S.W.G.).

Constants.—Area, 0·02011 sq. in.; breaking-strength, 1,368 lb.; diameter, 0·160 in.; loading factor, 3·652; maximum tension in conductor, 684 lb.; weight, 0·06834 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20. 40. 60. 80. 100.
Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag.
Chains. lb. Ft.in. lb. Ft.in. lb. Ft.in. lb. Ft.in. lb. Ft.in.
5 .. 414 2 3 369 2 7 312 3 0 274 3 5 242 3 10
6 .. 342 3 11 304 4 5 273 4 11 247 5 5 226 5 11
7 .. 292 6 3 268 6 10 248 7 4 230 7 11 216 8 6
8 .. 261 9 1 245 9 9 231 10 4 219 10 10 208 11 5

34,000 lb. BASIS.

(B.) 1/192 in. (6 S.W.G.).

Constants.—Area, 0·02895 sq. in.; breaking-strength, 1,968 lb.; diameter, 0·192 in.; loading factor, 3·093; maximum tension in conductor, 984 lb.; weight, 0·09841 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20. 40. 60. 80. 100.
Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag.
Chains. lb. Ft.in. lb. Ft.in. lb. Ft.in. lb. Ft.in. lb. Ft.in.
5 .. 704 1 11 616 2 2 535 2 6 465 2 11 406 3 4
6 .. 613 3 2 542 3 7 480 4 0 427 4 6 384 5 0
7 .. 535 4 11 482 5 5 438 6 0 398 6 7 367 7 2
8 .. 479 7 2 441 7 9 408 8 5 380 9 0 357 9 7


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✨ LLM interpretation of page content

🏗️ V.I.R. Copper Wind Load Tables (continued from previous page)

🏗️ Infrastructure & Public Works
Electrical Conductors, Wind Load, Sag, Tension, Engineering

🏗️ Bare Galvanized Iron Wind Load Tables

🏗️ Infrastructure & Public Works
Electrical Conductors, Wind Load, Sag, Tension, Engineering

🏗️ Bare Galvanized Steel Wind Load Tables

🏗️ Infrastructure & Public Works
Electrical Conductors, Wind Load, Sag, Tension, Engineering