SAFETY
Scaffolds Wood,
steel -plumb
must be 6 in 3000 -mud
sill should be continuous under at least two legs but if only one can
be done at a time the minimum size is: single mud sill ply wood
38x300x300 -three
times higher than min base must be fastened to building and every 6m
vertical after that, horizontal every three sets of frames and 6.4
metres guys
must be able to withstand 900lbs or 4kn -guard
rails must be installed if over ten feet -toe
boards 19x100 must have no more than 12 under neath -scaffold
planks min.48x251 #2 or better -doubled 38 by 235 0r for a 6 foot
span a single 38 by 235 -minimum
work platform is 500 -maximum
slope is 1:5 -supports
3m for light work and 2m for heavy work -over hang more than 150 less than 300
Safety fall
protection fall
anchors single person 5000 lb., 22 kn -control
zones 7 feet -harnessed
at 3000 -vertical
lifelines must have a breaking strength of 6000 lb. 26.7 kn extend to
with in 1.4 meters of the ground -check
hook and ring for roll out -belts
are good for fall restraint only -check
equipment daily -
horizontal fall
arrest line 1/2 inch steel cable -20,000
lb. anchor -horizontal
fall restraint line 800 lb. anchor -rope
grabs -lanyards -
wire lanyards no shock protection -safety
block -carabiner Safety fire
extinguishers types and symbols: -”A”
wood paper -water - symbol triangle -”B”
liquids, gas - CO2 -symbol
square - water
spreads -“D”
metals - water can start fire -symbol
star -Halon
type extinguishers are clean and do not damage electronics _
all around best extinguisher is currently Triplex dry chemical Fire
blocks: -fire
stops must be placed in concealed spaces -vertical
wall must have fire stops every 3 meters -fire
stops at cove ceilings dropped ceilings -on
stairs and landings Fire
stop materials : 38 lumber, 12.5 plywood, 12.7 wafer board, 12.7 gypsum .38
sheet steel -smoke
alarms must be installed between the sleeping unit and the dwelling
area at ceiling height Safety hoists -1
bell stop -2
bells raise -3
bells lower -4
bells all clear Safety lifting -back
straight -feet
slightly apart -weight
over both feet -careful
when vision is blocked Safety lockout
procedures -
secure all parts against movement -control
exposed energy -lock
out energy supply to the machine Safety occupational
Safety and health committee -management
and workers sit on the committee -worker
considers a job dangerous can go to WCB. -minutes
must be taken at meetings -education
and training are functions of committee agendas contain time place of
meeting and all items to receive attention Safety weather -hypothermia
cold -hyperthermia
heat -dehydration -sunstroke -heat
exhaustion high
winds -icy
conditions WHMIS -workplace
hazardous material identification system -symbols
compressed gas, flammable, oxidizing, poisonous, Bio-
hazardous-infectious, toxic, corrosive, dangerously reactive, explosion
hazard -MSDS
material Safety data sheets contain: product id, ingredients, physical
data, fire and explosion data, reactivity data, toxic properties, Safety Electrical Hoist,
crane Rigging numbers
electrical -3
meters 750, 75,000 volts -4.5
meter 75,000 to 250,000 volts -6
meters over 250,000 volts Safety Lifelines fall
arrest horizontal lifeline -horizontal
lifeline 1/2 wire rope breaking strength of 89kn (20000) -hardware
71kn(16000) -span
6m to 18m -line
1m above working surface -max
3 workers -does not impede safe movements
Safety Lifelines fall
arrest vertical -strength
27kn (6000) -lifeline
protected from abrasion -extend
1200 from ground -lifeline
no longer than 91m(300) -one
worker per lifeline -shock
absorber when using a steel lanyard
Safety Lifelines fall
restraint
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