Manlifts covered by this scope consist of steps (platforms) and accompanying handholds mounted on, or attached to, an endless belt operating vertically in one . Donor challenge: Your generous donation will be matched 2-to-1 right now. Your $5 becomes $15! Dear Internet Archive Supporter,. I ask only. ~^k * * ASME A (), Safety Standard for Belt Manlifts as incorporated and mandated by the States and Municipalities, including the Minnesota.
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If a dismounting platform is used, the edge of this platform should be in line with the outer edge of the openings at the upper floors.
ASME A90.1: Safety Standard for Belt Manlifts
Top and bottom floor warning signs and lights The landing space shall be at least 2 ft mm in width from the edge of the floor opening used for mounting and dismounting see Figs. Each step or step surface shall be in high contrast color with the belt. Guardrails and gate operation The brake shall stop and hold the belt with test load within a maximum of 24 in. All handholds on any given manlift should be located the same distance above the step treads.
If located in buildings to which the public has access, manlifts shall be located in an enclosure protected by self-closing, spring-locked doors. The third auto- matic stop device shall consist of one of the following: Such proposals should be as specific as possible: The inspecting individual shall immediately report any unsafe acts or unauthorized use to proper personnel 8.
To take wsme of asje in voltage, etc. These main drive supporting members shall be designed to support the entire combined loads of the pulley, belt steps [ lb 90 kg on each, step], hand- holds, all of the drive machinery plus the bottom pulley and related bottom pulley components that contribute to the load on the head pulley.
Belt tracking at drive pulley 7. Safety switches on movable hoods The bottom pulley shall be provided with a debris deflector see Figs.
Full text of “ASME A (): Safety Standard for Belt Manlifts”
A time delay switch may be required as part of an electronic device installation to permit passage of empty steps. Any stresses set up during acceleration or stopping are to be included in the above factor of safety.
Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. The SI units have been directly softly converted from the Customary units.
Phrase the question as a request for an interpretation of asms specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation. It is recommended that all electrical motor control appara- tus and safety relays be placed in a locked enclosure so as to prevent tampering by unauthorized persons.
Where the fixed hood specified in para. Two separate auto- matic safety stops shall be provided to shut off the elec- tric power and apply the brake when a loaded step passes the bottom landing refer to para.
All other safety stops shall be manually tested. Where there is a travel of 50 ft 15 m or more between floor landings, a09.1 or more emergency landing s shall be provided so that there is a landing either floor or emergency for every 25 ft 7.
ASME A Safety Standard for Belt Manlifts
After three years of concentrated work, the Committee approved by ballot, ina completely revised draft of the A Where sepa- rate switches are provided at each landing, any one switch shall turn on all. Manlifts shall not be available to the general public.
All head pulleys shall be lagged i. The landing surface at the entrances and exits to the manlift shall be constructed and maintained to provide safe footing at all times.
One of these devices shall activate while the step is still in the horizontal position. Such damage is not continuous across the full width of the belt.
This minimum 66 in. Existing asm V-belt drive systems are permissi- ble. Prompted by several serious manlift accidents, the Committee, through correspondence inconsidered additional changes to the standard. If a handhold is removed permanently or tempo- rarily, the corresponding step and handhold for the opposite direction of travel shall be removed before the manlift is again placed in service.