New Zealand Gazette – 1935 – No. 49

Page 1888

✨ Technical Standards Tables

1888

THE NEW ZEALAND GAZETTE.

[No. 49

Table 16.—To find Safe-working Load of Shackles and Rings.

Diameter.	Shackle.		Ring.	Diameter.	Shackle.		Ring.
	Iron.	Pin.			Iron.	Pin.
In.	C.	C.	C.	In.	C.	C.	C.
3/8	2·43	1·4	3·55	1½	155·30	89·87	227·2
½	5·75	3·33	8·41	1⁹/₁₆	175·54	101·59	256·83
⁹/₁₆	8·19	4·74	11·79	1⁵/₈	197·45	114·26	288·87
⁵/₈	11·23	6·0	16·43	1¹¹/₁₆	221·1	127·95	323·47
¹¹/₁₆	14·95	8·65	21·88	1¾	246·58	142·7	360·76
¾	19·41	11·23	28·40	1¹³/₁₆	273·96	158·55	400·82
¹³/₁₆	24·68	14·28	36·11	1⁷/₈	303·32	175·54	443·77
⁷/₈	30·82	17·84	45·1	1¹⁵/₁₆	334·65	193·67	489·62
¹⁵/₁₆	37·92	21·94	55·47	2	368·11	213·03	538·56
1	46·01	26·63	67·32	2¹/₈	441·53	255·52	645·98
1¹/₁₆	55·17	31·93	80·72	2¼	524·12	303·32	766·82
1¹/₈	65·52	37·92	95·86	2³/₈	616·42	356·73	901·85
1³/₁₆	77·07	44·6	112·76	2½	718·96	416·08	1,051·9
1¼	89·86	52·01	131·47	2⁵/₈	832·1	481·66	1,217·7
1⁵/₁₆	104·04	60·21	152·21	2¾	956·94	553·8	1,400·1
1³/₈	119·64	69·23	175·03	2⁷/₈	1,092·2	632·05	1,597·8
1⁷/₁₆	136·66	79·09	199·94	3	1,242·4	718·98	1,817·7

S.W.L. of shackle = C / 8W . W = Width of gap in inches.

S.W.L. of ring = C / 8D₁ . D₁ = Mean diameter of ring in inches.

Note.—S.W.L. of shackle is obtained from iron or pin constant, whichever is least.
Example.—Shackle: Iron, 1¼ in.; pin, 1⁵/₁₆ in.; gap, 2½ in.

C for iron = 65·52; C for pin = 60·21 ∴ S.W.L. = 60·21 / 20 = 3·01 tons.

Example.—Ring: Iron, 1 in.; inside diameter = 4 in. ∴ Mean diameter = 5 in

S.W.L. = 67·32 / 40 = 1·683 tons.

For S.W.L. of bow shackles, see Table 17.

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VUW Te Waharoa — NZ Gazette 1935, No 49

NZLII — NZ Gazette 1935, No 49

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🚂 Safe-working loads for shackle-iron and shackle-pins (continued from previous page)

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KeywordsShackle-iron, Shackle-pins, Safe-working loads, Technical standards, Tables

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