12 CRR-NY 23-8.4NY-CRR

OFFICIAL COMPILATION OF CODES, RULES AND REGULATIONS OF THE STATE OF NEW YORK
TITLE 12. DEPARTMENT OF LABOR
CHAPTER I. INDUSTRIAL BOARD OF APPEALS
SUBCHAPTER A. THE INDUSTRIAL CODE
PART 23. PROTECTION IN CONSTRUCTION, DEMOLITION AND EXCAVATION OPERATIONS
SUBPART 23-8. MOBILE CRANES, TOWER CRANES AND DERRICKS
12 CRR-NY 23-8.4
12 CRR-NY 23-8.4
23-8.4 Special provisions for derricks.
(a) Bracing of foot blocks.
The foot blocks of every derrick shall be securely supported and firmly anchored against movement in any direction.
(b) Guys.
(1) Number and spacing. The top of any guy derrick mast more than 25 feet in height shall be steadied by not less than six wire rope guys so spaced as to make the angles between adjacent guys approximately equal.
(2) Attachment. Wire rope guys shall be secured by either weldless steel sockets, thimble and splice connections, thimbles with proper size and numbers of rope clips or cast steel guy plates having grooved bearing surfaces of the same shape and size as the wire rope thimbles, using a spliced or wire rope clip attachment.
(3) Anchoring. Guys shall be attached to strong permanent construction or to substantial “dead men” securely anchored in the ground.
(c) Breast-type derricks.
Breast-type derricks shall be guyed from both the front and rear. Where front guys are not possible because of derrick operation, provisions shall be made to prevent such derricks from tipping over backward. Breast-type derricks which are operated by hand power shall have hand grips securely and positively fastened to the shaft and a ratchet and pawl shall be provided which will hold any load.
(d) Derrick construction.
(1) Materials. The mast, boom, frame and similar parts of a derrick shall be constructed of suitable steel or of selected wood of proper strength and durability.
(2) Mast fittings. On derricks which have booms larger than the masts, the gudgeon pins, mast tops and goosenecks shall be securely fastened to the tops of the masts to prevent such parts from pulling out when the booms are raised.
(e) Derrick capacity charts.
(1) A capacity chart shall be provided for every derrick and such chart shall be posted conspicuously on the job site. Unless furnished by the manufacturer or builder of the derrick, the capacity chart shall be prepared and certified by a professional engineer licensed to practice in the State of New York and a copy thereof shall be submitted, upon request, to the commissioner.
(2) A derrick shall not lift any load that exceeds the relevant maximum specified on its capacity chart.
(f) Derrick boom raising.
The boom of any derrick shall not be raised from the level of the surface on which the derrick rests other than by the use of its own hoisting capabilities. The design, construction and length of the boom shall be such that there is no undue stress imposed on the derrick structure or mechanism during such raising operations.
12 CRR-NY 23-8.4
Current through April 15, 2021
End of Document