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مکانیک::
جرثقیل برجی
The cranes may be mounted on "fixed bases" or "traveling bases" and may have tower and supporting structure arrangements that permit the crane to climb in a structure being built or that permits increasing the crane's tower height as the structure rises.
brace, tower: a structural attachment placed between a crane tower and an adjacent structure to pass loads to
(s) Guys, when used, shall have a means to adjust their tension and to plumb the crane tower while the crane is balanced.
The maximum and minimum vertical spacing between the crane tower supports, and the height of the crane above the uppermost support, shall be in accor- dance with the manufacturer's or a qualified person's instructions.
(i) Initially, and after each climb, the crane tower shall be plumbed while balanced as specified by the crane manufacturer or a qualified person and then secured in the plumbed condition.
واژگان شبکه مترجمین ایران