Environmental Engineering Reference
In-Depth Information
lammable.or.combustible.liquids.must.be.in.a.separate.building.detached.from.other.
important.buildings.or.cut.off.in.a.standard.manner..Whenever.lammable.or.combus-
tible. liquids. are. transferred. from. one. container. to. another,. both. containers. must. be.
effectively.bonded.and.grounded.to.prevent.the.discharge.of.sparks.or.static.electricity.
All. spraying. areas. must. be. kept. as. free. from. the. accumulation. of. deposits. of.
combustible. residues. as. practical,. with. cleaning. conducted. daily. if. necessary..
Scraper,. spuds,. or. other. tools. used. for. cleaning. purposes. must. be. of. nonspark-
ing. materials.. Residue. scrapings. and. debris. contaminated. with. residue. must. be.
immediately.removed.from.the.premises..“No.smoking”.signs.in.large.letters.on.
contrasting.color.background.shall.be.conspicuously.posted.in.all.spraying.areas.
and.paint.storage.rooms.
Adequate.ventilation.must.be.ensured.before.spray.operations.begin..Mechanical.
ventilation. must. be. provided. when. spraying. operations. are. performed. in. enclosed.
areas..When.mechanical.ventilation.is.provided.during.spraying.operations,.it.must.
be.so.arranged.that.it.will.not.circulate.the.contaminated.air.
stAIrs, FIxed IndustrIAl (29 cFr 1910.23 And 1910.24)
Fixed. stairways. must. be. provided. for. access. from. one. structure. to. another. where.
operations.necessitate.regular.travel.between.levels.and.for.access.to.operating.plat-
forms. at. any. equipment. that. requires. attention. routinely. during. operations.. Fixed.
stairs.must.also.be.provided.where.access.to.an.elevation.is.daily,.or.at.each.shift.
where.such.work.may.expose.employees.to.harmful.substances.or.for.purposes.for.
which.carrying.of.tools.or.equipment.by.hand.is.normally.required..Spiral.stairways.
are.not.permitted,.except.for.special.limited.usage.and.secondary.access.situations.
where.it.is.not.practical.to.provide.a.conventional.stairway.
Every.light.of.stairs.having.four.or.more.risers.must.be.provided.with.a.standard.
railing.on.all.open.sides..Handrails.must.be.provided.on.at.least.one.side.of.closed.
stairways,.preferably.on.the.right.side.descending..Fixed.stairways.must.have.a.mini-
mum. width. of. 22. inches.. Stairs. must. be. constructed. so. the. riser. height. and. tread.
width.are.uniform.throughout.and.do.not.vary.by.more.than. 1 / 4 .inch..Other.general.
requirements.include
.
1.. A.stairway.or.ladder.must.be.provided.at.all.worker.points.of.access.where.
there. is. a. break. in. elevation. of. 19. inches. or. more. and. no. ramp,. runway,.
embankment,.or.personnel.hoist.is.provided.
.
2.. When. there. is. only. one. point. of. access. between. levels,. it. must. be. kept.
clear.to.permit.free.passage.by.workers..If.free.passage.becomes.restricted,.
a second.point.of.access.must.be.provided.and.used.
.
3.. Where.there.are.more.than.two.points.of.access.between.levels,.at.least.one.
point.of.access.must.be.kept.clear.
.
4.. Stairways.must.be.installed.at.least.30.degrees.and.no.more.than.50.degrees—
from.the.horizontal.
.
5.. Where. doors. or. gates. open. directly. onto. a. stairway,. a. platform. must. be.
provided.that.extends.at.least.20.inches.beyond.the.swing.of.the.door.
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