ASME A90.1-2003 pdf – SAFETY STANDARD FOR BELT MANLIFTS
ASME A90.1-2003 pdf – SAFETY STANDARD FOR BELT MANLIFTS.
the motor starter contacts and the other point should be an auxiliary contact with load carrying capacity equal to or greater than the motor starter contacts. If copper to carbon contacts are used, then only one break in each phase is required.
(e) Reverse phase relay and phase failure protection are required on all manlift installations.
NOTE: It is recommended that all electrical motor control apparatus and safety relays be placed in a locked enclosure so as to prevent tampering by unauthorized persons.
5.8 Start/Stop Control Rope
5.8.1 Location and Requirements. A start/stop control rope shall be provided within easy reach of the up- and down-runs of the belt, incorporating rope guides and pulley arrangements to restrict lateral movement.
5.8.2 Operation. This control rope shall be so connected to a control lever or operating mechanism that it will cut off the electric power and apply the brake when pulled in the direction of travel. When pulled in the opposite direction of travel, the power will be restored and the brake released, without having to reset motor controls.
5.8.3 Control Rope. The control rope shall consist of a wire-center rope with a minimum diameter of % in. (9.5 mm). Wire rope shall not be used.
5.9 Factor of Safety
All parts of the machine shall have a factor of safety of 6, based on a load of 200 lb (90 kg mass) on each horizontal step on the up- and down-runs.
NOTE: Any stresses set up during acceleration or stopping are to be included in the above factor of safety. This paragraph does not apply to belts. See para. 5.2.3.
6 INSTRUCTION AND WARNING SIGNS
6.1 Instruction Signs at Landings and on Belt
Signs of a conspicuous and easily-read style giving instructions for the use of the manlift shall be posted at each landing and on the belt at each handhold.
6.1.1 Size and Legibility. Such signs shall be of letters not less than I in. (25 mm) in height and of a color having high contrast with the surface on which it is stenciled or painted.
(C) When riding a manlift, the rider shall stand squarely on the top surface of the step, in an upright position, and face the belt while grasping the handhold securely with both hands. Jumping on the step, yanking on the handhold, or horseplay of any kind is prohibited. Only one rider per step is permitted.
(d) No freight, packaged goods, pipe, lumber, or materials of any kind shall be carried or transported on any manlift.
(e) No tools, except those fitting entirely within a pocket, tool pouch, or holster designed specifically for small hand tools and attached to an employee’s belt or body harness (the kind from which no tools are able to protrude) shall be carried on any manlilt.
(f) Before starting or restarting a manlift, it shall be necessary to alert all riders on the manlift and all others in its vicinity.
8 TESTS AND INSPECTiONS
8.1 Acceptance and Annual Tests
NOTE: On completion of the manlift installation, there should be an acceptance test performed by the installer in the presence of the owner, owner’s representative, and/or the representative of the enforcement department. Under no circumstances shall humans be used as weights for testing.
The same series of tests as nutlined in this paragraph shall be performed by the owners on an annual basis.
8.1.1 Up Capacity. The manlift with 200 lb (90 kg mass) on each horizontal step of the up-run shall show no appreciable slip of the belt when standing or running at rated speed.
8.1.2 Down Capacity — Brake. The manlift with 200 lb (90 kg mass) on each horizontal step of the down- run shall show no appreciable slip of the belt when standing or running at rated speed. The brake shall stop and hold the belt with test load within a maximum of 24 in. (610 mm) of travel.