Environmental Engineering Reference
In-Depth Information
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4.. Inspection.results.and.reports:
.
a..
Report.form.used.(NBIC.NB-7,.API.510,.or.other)
.
b..
Summary.of.type.and.extent.of.damage.or.cracking
.
c..
Disposition.(no.action,.delayed.action,.or.repaired)
Information.acquired.from.the.above.items.is.not.adaptable.to.any.kind.of.numer-
ical.ranking.for.quantitative.safety.assessment.purposes..However,.the.information.
can.reveal.the.owner.or.user's.apparent.attention.to.good.practice,.careful.operation,.
regular.maintenance,.and.adherence.to.the.recommendations.and.guidelines.devel-
oped.for.susceptible.applications..If.the.assessment.indicates.cracking.and.other.seri-
ous. damage. problems,. it. is. important. that. the. inspector. obtain. qualiied. technical.
advice. and. opinion.. After. all,. safety. and. health. are. of. primary. concern. regarding.
pressure.vessels.
rAIlIngs (29 cFr 1910.23)
OSHA's.general.requirements.apply.to.all.stair.rails.and.handrails..Stairways.having.
four.or.more.risers,.or.rising.more.than.30.inches.in.height—whichever.is.less—must.
have.at.least.one.handrail..A.stair.rail.must.also.be.installed.along.each.unprotected.
side.or.edge..When.the.top.edge.of.a.stair.rail.system.also.serves.as.a.handrail,.the.
height.of.the.top.edge.must.be.no.more.than.37.inches.or.less.than.36.inches.from.
the.upper.surface.of.the.stair.rail.to.the.surface.of.the.tread..Winding.or.spiral.stair-
ways.must.have.a.handrail.to.prevent.using.areas.where.the.tread.width.is.less.than.
6 inches..Stair.rails.installed.after.March.15,.1991,.must.not.be.less.than.36.inches.
in.height.(see.Figure 25.21).
Midrails,.screens,.mesh,.intermediate.vertical.members,.or.equivalent.intermediate.
structural.members.must.be.provided.between.the.top.rail.and.stairway.steps.to.the.
stair.rail.system..Midrails,.when.used,.must.be.located.midway.between.the.top.of.the.
FIgure 25.21
Example.of.a.stair.rail.and.handrail.
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