New Zealand Gazette – 1935 – No. 65

Page 2534

✨ Engineering Tables

2534
THE NEW ZEALAND GAZETTE.
[No. 65

TABLE VIII.—STEEL-REINFORCED ALUMINIUM (4 STEEL
3 ALUMINIUM).

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

Constants.—Coefficient of thermal expansion = 7·74 × 10⁻⁶ per degree Fahrenheit; modulus of elasticity = 20·2 × 10⁶ lb. per square inch.

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

7/·0834 in.

Constants.—Area, 0·03824 sq. in.; breaking-strength, 4,180 lb.; diameter, 0·250 sq. in.; loading factor, 4·134; maximum tension in conductor, 1,672 lb.; weight, 0·0936 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft.in.
180	16190	5½
220	15940	8¾
260	15621	0¼
300	15281	4½
340	14871	10
380	14432	4

TABLE IX.—BARE COPPER-COVERED STEEL.

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

Constants.—Coefficient of thermal expansion = 7·2 × 10⁻⁶ per degree Fahrenheit; modulus of elasticity = 20 × 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.

(A.) 1/·162 in.

Constants.—Area, 0·02062 sq. in.; breaking-strength, 1,800 lb.; diameter, 0·162 in.; loading factor, 3·475; maximum tension in conductor, 720 lb.; weight, 0·073 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft.in.
180	658	0 5½
220	629	0 8½
260	594	1 0
300	556	1 6
340	514	2 1
380	472	2 9

(B.) 1/·204 in.

Constants.—Area, 0·03278 sq. in.; breaking-strength, 2,650 lb.; diameter, 0·204 in.; loading factor, 2·821; maximum tension in conductor, 1,060 lb.; weight, 0·116 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft.in.
180	987	0 5¾
220	953	0 9
260	914	1 1
300	869	1 6
340	823	2 0
380	773	2 9

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VUW Te Waharoa — NZ Gazette 1935, No 65

NZLII — NZ Gazette 1935, No 65

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✨ LLM interpretation of page content

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

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

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