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.
|Published (Last):||18 December 2008|
|PDF File Size:||14.56 Mb|
|ePub File Size:||3.35 Mb|
|Price:||Free* [*Free Regsitration Required]|
Prompted by several serious manlift accidents, the Committee, through correspondence inasmw additional changes to the standard. After the manlift has been stopped by an automatic safety stop, it shall be necessary to reset the electrical control circuit manually.
See Asm Appendix II for a sample inspection form. The hood shall be made of not less than No. The manlift with 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. Manlift belts shall be centered in the floor openings. Top pulleys and bottom pulleys shall have a diameter of not less than 20 in. On request, the Q90.1 Committee will render an interpretation of any requirement of the standard. Such damage is not continuous across the full width of the belt.
Speed may be determined by a revolution counter on the top head pulley, where the revolutions per minute are multiplied by D, where D is the diameter in feet, or may be determined with a tachometer with a 6 in.
All such platforms shall then be considered part of the emergency landing and provided with standard railings and toeboards.
Full text of “ASME A (): Safety Standard for Belt Manlifts”
Correspondence should be addressed to: Top and bottom floor warning signs and lights Corners of gates shall be rounded. The landing surface at the entrances and exits to the adme shall be constructed and maintained to provide safe footing at all times. It is not the intent of this requirement to provide total enclosure.
Step clearance at bottom pulley Pit opening or floor plate, if used, shall conform with para. When a pit is used or a dismounting platform is provided, a990.1 dismounting level shall be at or above the point at which the upper surface of the descending z90.1 is in the hori- zontal position and the step has not contacted the bottom safety stops prior to beginning its turn.
The test shall be performed while the machine is stationary. No step shall be provided unless there is a corresponding handhold above and below it meeting the requirements of para.
Work was started in on a revision of this Standard.
ASME A Safety Standard for Belt Manlifts
The actuating bar shall be hinged or of a breakaway type so as not to create a hazard. Revisions are made periodically to the standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the standard. Immediately below the top floor an illuminated sign shall display the following wording: Head shaft bearings and lubrication 12, Floor hoods and openings Both runs of the manlift shall be illu- minated at all times when the lift is in operation.
When pulled in the opposite direction of travel, the power will be restored and the brake released, without having to reset motor controls.
The instructions shall read approxi- mately as follows: Lighting of manlift runways shall be by means of circuits permanently tied into the building circuits no switchesor lighting shall be controlled by switches at each landing.
The third auto- matic stop device shall consist of one of the following: The width of the belt may be less than those dimensions specified in para. Such a ladder may be built into the supporting structure of the manlift and may be parallel to the plane of the manlift or perpendicu- lar to the plane of the manlift see Figs.
Floor opening widths for both the up- and down-runs for existing installations shall be in accordance with Table 1 and Fig. One point of each phase may be 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.
ASME A90.1: Safety Standard for Belt Manlifts
Entry shown on two sides; entry on one side is adequate. The guide rails shall not be displaced and there shall be no visible deformation, deflection, or misalignment of the step or its support during the test.
Enroute to the top, have each trainee stop and start the manlift at one or more floors with the required warning at startup to become familar with rope control.
Explain the “why” of each rule. No encroachment of structural or machine supporting members within this space shall be per- mitted.
If located in buildings to which the public has access, manlifts shall be located in an enclosure protected by self-closing, spring-locked doors. Each provision of the original code was carefully evaluated in the light of considerable practical field experience.
It may be useful to have all floors and landings numbered or identified by name to eliminate confusion by riders. Each step shall be sub- jected to a lb kg mass load applied to its center while the adme is stationary. Participation by a azme agency representative s or person s affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.
The reset shall be so asmr that a person resetting it shall have a clear view of both the up- and down-runs of the manlift. The A90 Standards Committee regularly holds meet- ings that are open to the public.
Top pulley and lagging Frazelie, Archer Daniels Midland G. The split-rail safety stops or in- track equivalent safety stops shall be tested by placing a weight of 50 lb 25 kg on the approximate center of the step or platform and running the manlift in the appropriate direction until the manlift is stopped by the safety stop.
Jumping on the step, yanking on the handhold, or horseplay of any kind is prohibited. The landing space adja- cent to the floor openings shall be free from obstruction and kept clear at all times. Where no pit is used, a dismounting plat- form on the down-side is not required see Fig. 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.
Adequate lighting, not less than 5 fc 54 lxshall be provided at each floor landing at all times when the lift is in operation.