ASME B30.11-2004 pdf – Monorails and Underhung Cranes
ASME B30.11-2004 pdf – Monorails and Underhung Cranes.
11-1.6.1 Cab Location and Internal Arrangement
(a) The general arrangement of the cab and the location of the control and protective equipment should be such that all operating control devices are within reach of the operator when facing the area to be served by the load block, or while facing in the direction of travel of the cab.
(b) The arrangement of the cab should allow the operator to view the load block in all positions. When physical arrangements obscure the operator’s view, the operator shall be aided by other means such as, but not limited to, closed circuit TV, mirrors, radio, telephone, or a signalperson.
(c) The cab shall be clear of all fixed structures within its area of movement.
(d) The clearance of the cab above the working floor or passageway should not be less than 7 ft (2.1 m), except when operations require dimensions that are less. In this case, precautions shall be taken during the operation of the crane or carrier to keep personnel and other obstructions clear of the low overhead cab.
11-1.6.2 Cab Construction
(a) Where the cab operates on a single track, the cab may be mounted on a separate carrier or can be an integral part of the hoist carrier. On double-girder cranes, the cab shall be rigidly attached to the carrier or the crane to minimize swing.
(b) If an integral outside platform is provided, the door (if provided) shall slide or open outward.
(c) In the absence of an outside platform, the door (if provided) shall slide or open inward and shall be selfclosing. It shall be equipped with a latching device.
(d) Guardrails and toeboards shall be in compliance with ANSI A1264.1.
(e) Outdoor cabs should be enclosed. All cab glazing shall be of safety glazing material as defined in ANSI
(f) Where a danger from falling objects exists, the cab construction shall offer protection. The protection shall support a minimum static load of 50 lb/ft2 (2.4 kPa).
(g) If the cab of a hot molten material crane or carrier is exposed to heat, it shall be provided with the following or equivalent protection:
(1) Where the cab is located near the source of radiant heat, the cab shall he protected by a heat shield located between the cab and heat source.
(2) Cab areas that are subjected to molten metal spatter shall be shielded, or have heat and spatter resistant clear panels or heat screens where required, to proide operator vision and protection.
(3) The floor shall be thermally insulated.
11-1.6.3 Access to Cab
Access to the cab shall be by a fixed ladder, stairs, or platform requiring no step over any gap exceeding 12 in. (305 mm). Fixed ladders shall be in conformance with
If a receptacle is provided for the stowing of tools and oilcans, it shall be metal and securely fastened in the cab.
11-1.6.5 Fire Extinguisher
A portable fire extinguisher with a basic minimum extinguisher rating of 10 BC shall be installed in the cab.
Cab lighting, either natural or artificial, shall provide a level of illumination that enables the operator to observe the operating controls.
There should be means of egress from cab-operated cranes or carriers to permit departure under emergency conditions. The means of egress should depend upon the facts of the situation.
SECTION 11-1.7 GUARDS AND LUGS
1-1.7.1 Guards for Moving Parts
(a) Exposed moving parts, such as gears, set screws, projecting keys, chains, chain sprockets, and reciprocating components that constitute a hazard under normal operating conditions, shall be guarded.
(b) Each guard shall be capable of supporting 200 lb (90 kg), without permanent deformation, unless the guard is located where it is not probable for a person to step on it.
11-1.7.2 Guards for Hoisting Ropes
(a) If it is possible for hoisting ropes to foul or chafe on adjacent parts of the crane under normal operating conditions, guards shall be installed to minimize damage to the rope.
(b) A guard shall be provided to prevent contact between bridge or runway conductors and hoisting ropes, if under normal operating conditions they can come into contact.
Means shall be provided to limit the drop of a bridge end truck frame in case of wheel, axle, or load bar failure, and shall be located on both sides of the track to provide central loading of the track about the vertical axis if failure occurs.