NHI Safety Inspection of In-Service
Bridges Final Exam 147 Questions |
With Correct Solutions!
Clacking
the sound of delaminated concrete
Pinging
the sound of "sound" concrete
Where are shear key joints?
between pre-cast deck panels
Where can you find anchorage zones?
precast deck tie rods
flexure cracks are primarily what direction compared to the primary
reinforcement?
,perpendicular
Main inspection area for FRP bridges?
Joints
Assembly joint without seal- sliding plate
two steel plates sliding on top of one another with maximum movement of 4
inches
Compression joint seal
rectangle of neoprene with a honeycomb cross section. Can handle movement of
2 inches
pourable joint seal
made of three materials (backing material, joint filler, and a poured joint sealant)
and can only accommodate movement of 1/4 inch. Used on short spans
strip seal expansion joint
,two slotted steel anchorages cast into a deck or back wall. A neoprene seal fits
into the grooves to span the joint. max movement of 4 inches
Cellular joint seal
different than compression because of material used to close joint. Made up of
closed-cell foam that allows the joint to move in different directions. Allows for
both parallel and perpendicular joint movement
Assembly joint with seal- plank
steel reinforced neoprene that supports vehicular loads over the joint and allow
for movement up to 4 inches
Assembly joint with seal- sheet
two blocks of steel reinforced neoprene. thin sheet of neoprene spans the joint
and connects the two blocks. Allows for up to 4 inches
open expansion joint
gap between the bridge deck and the back wall of the abutment or adjacent deck
section. usually found on short span bridges, usually unprotected
, Assembly joint without seal- finger plate
tooth plate joint, two steel plates that have interlocking fingers. usually on longer
spans. can accommodate movement from 4 to 24 inches
drainage system
move water away from specific locations (to protect the bridge)
grade and cross slope
directs the runoff to the inlets and helps eliminate or reduce ponding
inlets
receives water
outlet pipes
leads water away from the drain
downspout pipes
directs deck drainage from outlet pipe
Bridges Final Exam 147 Questions |
With Correct Solutions!
Clacking
the sound of delaminated concrete
Pinging
the sound of "sound" concrete
Where are shear key joints?
between pre-cast deck panels
Where can you find anchorage zones?
precast deck tie rods
flexure cracks are primarily what direction compared to the primary
reinforcement?
,perpendicular
Main inspection area for FRP bridges?
Joints
Assembly joint without seal- sliding plate
two steel plates sliding on top of one another with maximum movement of 4
inches
Compression joint seal
rectangle of neoprene with a honeycomb cross section. Can handle movement of
2 inches
pourable joint seal
made of three materials (backing material, joint filler, and a poured joint sealant)
and can only accommodate movement of 1/4 inch. Used on short spans
strip seal expansion joint
,two slotted steel anchorages cast into a deck or back wall. A neoprene seal fits
into the grooves to span the joint. max movement of 4 inches
Cellular joint seal
different than compression because of material used to close joint. Made up of
closed-cell foam that allows the joint to move in different directions. Allows for
both parallel and perpendicular joint movement
Assembly joint with seal- plank
steel reinforced neoprene that supports vehicular loads over the joint and allow
for movement up to 4 inches
Assembly joint with seal- sheet
two blocks of steel reinforced neoprene. thin sheet of neoprene spans the joint
and connects the two blocks. Allows for up to 4 inches
open expansion joint
gap between the bridge deck and the back wall of the abutment or adjacent deck
section. usually found on short span bridges, usually unprotected
, Assembly joint without seal- finger plate
tooth plate joint, two steel plates that have interlocking fingers. usually on longer
spans. can accommodate movement from 4 to 24 inches
drainage system
move water away from specific locations (to protect the bridge)
grade and cross slope
directs the runoff to the inlets and helps eliminate or reduce ponding
inlets
receives water
outlet pipes
leads water away from the drain
downspout pipes
directs deck drainage from outlet pipe
