Environmental Engineering Reference
In-Depth Information
A
4
FIgure 25.18
Safe.use.of.portable.ladder..(
Source:
Courtesy.of.the.Occupational.Safety.
and.Health.Administration.)
grab.rail.must.be.provided.to.assist.workers.in.mounting.and.dismounting.the.ladder..
An.extension.ladder.must.not.delect.under.a.load.that.would.cause.the.ladder.to.slip.
off.its.supports.
Ladders. must. be. maintained. free. of. oil,. grease,. and. other. slipping. hazards..
Ladders. must. not. be. loaded. beyond. the. maximum. intended. load. for. which. they.
were.built.or.beyond.their.manufacturer's.rated.capacity..Ladders.must.be.used.only.
for.the.purpose.for.which.they.were.designed..Non-self-supporting.ladders.must.be.
used.at.an.angle.where.the.horizontal.distance.from.the.top.support.to.the.foot.of.
the.ladder.is.approximately.one-quarter.of.the.working.length.of.the.ladder..Wood.
job-made.ladders.with.spliced.side-rails.must.be.used.at.an.angle.where.the.horizon-
tal.distance.is.one-eighth.the.working.length.of.the.ladder.
Ladders.must.be.used.only.on.stable.and.level.surfaces.unless.secured.to.prevent.
accidental.movement..Ladders.must.not.be.used.on.slippery.surfaces.unless.secured.
or. provided. with. slip-resistant. feet. to. prevent. accidental. movement.. Slip-resistant.
feet. must. not. be. used. as. a. substitute. for. the. care. in. placing,. lashing,. or. holding. a.
ladder.upon.slippery.surfaces..Ladders.placed.in.areas.such.as.passageways,.door-
ways,.or.driveways,.or.where.they.can.be.displaced.by.workplace.activities.or.trafic,.
must.be.secured.to.prevent.accidental.movement.or.a.barricade.must.be.used.to.keep.
trafic.or.activities.away.from.the.ladder..The.area.around.the.top.and.bottom.of.the.
ladders.must.be.kept.clear.
The.top.of.a.non-self-supporting.ladder.must.be.placed.with.two.rails.supported.
equally. unless. it. is. equipped. with. a. single. support. attachment.. Ladders. must. not.
be. moved,. shifted,. or. extended. while. in. use.. Ladders. must. have. nonconductive.
