Responsibilities
informs operator weight movement and placement only one who can start a lift after it has been stopped
Lift Director
crane must be level within
1 percenr
this is the only allowable side loading
freely suspended loads
another name for loading
Dynamic Loading
definition of jib
Extension of the boom
uses verbal and non verbal communication to direct crane operator
Signal person
acurate measure of level place a level 90degrees apart on the
upper works
side loading can do this to a boom
break or severely damage
when lifting in water as the load comes out of the water loading on the crane will do this
increase
as jib angle offset increases the capacity of the jib?
decreases
Barricades keep nearby workers out of this on a crane
Tne operation radius of the outermost body of the crane
a level site and condition of soil must be good in order for this to apply
Load chart ratings
lifting out of level, rapid swing ,improper tip up actions, and high winds all can cause this
side loading
Lifting to fast will _____ effective load of weight
increease
This keeps a manual extension from retracting
Locking pin
operators shall have academic and performance guidelines in these 2
AMSE standard B30.5 and 29CFR 1926.1400
when a upper structure is rotated over the side the capacity will be _______ because the distance from the cranes center of gravity to the tipping axis is shortened
lower
this is one of the most overlooked stability factors and will increase load radius , decrease capacity, and make the crane hard to operate
wind
when pick and carry operations it is important to do these 3 things
use the shortest boom possible, keep load close to ground, load should be carried in line with direction of travel
True or False It takes 2 signal operators when making a multi crane lift
False only 1
written assesment and practical exam must be taken every____ years to obtain a crane cert
5 years
Hydralic boom sections should be extended
by manufactures specs
at most cases winds at ____ will stop crane operations per manufactures spec
30 mph
a sudden snatching of a load ,a frozen load, or rapid hoisting of the cable all can cause this
Shock loading
multi lifting requires each crane to be reduced______ of its net capacity
75%