NHI 130055 FINAL EXAM QUESTIONS
& PAASED ANSWERS
solid-sawn timber - Correct Answer ✔✔ Generally used in older, shorter span bridges,
spanning up to 25 feet
Glulam Beams - Correct Answer ✔✔ Typically simple span designs, and can span up to
80 feet
Stress-Laminated Timber Deck - Correct Answer ✔✔ Used post-tensioned rods or high
strength steel threaded rods
Stress-laminated bridge - Correct Answer ✔✔ Simple Spans up to 50 feet and capable
of carrying modern highway loads
Timber tee beam - Correct Answer ✔✔ Bridge consists of a stress laminated top flange
and Glulam beams
Through Truss Bridge - Correct Answer ✔✔ Deck located between top and bottom truss
chords
Deck Truss Bridge - Correct Answer ✔✔ Deck directly above the trusses
Timber truss bridges - Correct Answer ✔✔ Timber bridge usually spans 150-250 ft
Primary members of multi beam bridges - Correct Answer ✔✔ Beams
Secondary members of multi beam bridge - Correct Answer ✔✔ Diaphragm and cross
bracing
Visual inspection - Correct Answer ✔✔ What is the primary inspection method for
masonry, timber and FRP
Advanced method - Correct Answer ✔✔ Acoustic tomography and transverse vibration
are
What defects do you visually look for in timber - Correct Answer ✔✔ Checks, splits,
shakes, fungus decay, crushing, loose connections
Physical inspection for timber - Correct Answer ✔✔ Hammer sounding, pick test,
measuring
, Are shear zones mostly located near end of span or mid span - Correct Answer ✔✔
End of span
Compression - Correct Answer ✔✔ An arch is in: tension or compression
The space between masonry blocks is - Correct Answer ✔✔ Shear zone
3 functions of bearing - Correct Answer ✔✔ Transmit loads, permit longitudinal
movement of superstructure, allow rotation
4 basically parts common in most bearing - Correct Answer ✔✔ Sole plate, masonry
plate, bearing device, anchor bolts
Sliding plate bearing is an example of - Correct Answer ✔✔ Movable bearing
Movable bearing move in what way - Correct Answer ✔✔ Longitudinal and rotational
Typical examples of movable bearing - Correct Answer ✔✔ Roller, rocker, and sliding
plate
Elastomeric bearing - Correct Answer ✔✔ Bearing uses neoprene pad. Expansion and
contraction achieved through shear
Pot bearing - Correct Answer ✔✔ A type of high load multi rotational bearing. Allows
rotation
Load Path Redundancy - Correct Answer ✔✔ A bridge having three or more main load-
carrying members.
Internal Redundancy - Correct Answer ✔✔ Creation of multiple load paths by elements
that are mechanically fastened together.
Disk bearing - Correct Answer ✔✔ Bearing allows rotation and May allow translational
movement. Similar to pot bearing. Difference is bearing device
Enclosed bearing - Correct Answer ✔✔ Bearing Cannot adequately be evaluated
Fixed bearing - Correct Answer ✔✔ Restricts horizontal or translational movement. Only
allows rotation
Pinned rocker bearing - Correct Answer ✔✔ Example of moveable bearing
Abutment - Correct Answer ✔✔ the substructure at the ends of a bridge span or dam
whereon the structure's superstructure rests or contacts.
& PAASED ANSWERS
solid-sawn timber - Correct Answer ✔✔ Generally used in older, shorter span bridges,
spanning up to 25 feet
Glulam Beams - Correct Answer ✔✔ Typically simple span designs, and can span up to
80 feet
Stress-Laminated Timber Deck - Correct Answer ✔✔ Used post-tensioned rods or high
strength steel threaded rods
Stress-laminated bridge - Correct Answer ✔✔ Simple Spans up to 50 feet and capable
of carrying modern highway loads
Timber tee beam - Correct Answer ✔✔ Bridge consists of a stress laminated top flange
and Glulam beams
Through Truss Bridge - Correct Answer ✔✔ Deck located between top and bottom truss
chords
Deck Truss Bridge - Correct Answer ✔✔ Deck directly above the trusses
Timber truss bridges - Correct Answer ✔✔ Timber bridge usually spans 150-250 ft
Primary members of multi beam bridges - Correct Answer ✔✔ Beams
Secondary members of multi beam bridge - Correct Answer ✔✔ Diaphragm and cross
bracing
Visual inspection - Correct Answer ✔✔ What is the primary inspection method for
masonry, timber and FRP
Advanced method - Correct Answer ✔✔ Acoustic tomography and transverse vibration
are
What defects do you visually look for in timber - Correct Answer ✔✔ Checks, splits,
shakes, fungus decay, crushing, loose connections
Physical inspection for timber - Correct Answer ✔✔ Hammer sounding, pick test,
measuring
, Are shear zones mostly located near end of span or mid span - Correct Answer ✔✔
End of span
Compression - Correct Answer ✔✔ An arch is in: tension or compression
The space between masonry blocks is - Correct Answer ✔✔ Shear zone
3 functions of bearing - Correct Answer ✔✔ Transmit loads, permit longitudinal
movement of superstructure, allow rotation
4 basically parts common in most bearing - Correct Answer ✔✔ Sole plate, masonry
plate, bearing device, anchor bolts
Sliding plate bearing is an example of - Correct Answer ✔✔ Movable bearing
Movable bearing move in what way - Correct Answer ✔✔ Longitudinal and rotational
Typical examples of movable bearing - Correct Answer ✔✔ Roller, rocker, and sliding
plate
Elastomeric bearing - Correct Answer ✔✔ Bearing uses neoprene pad. Expansion and
contraction achieved through shear
Pot bearing - Correct Answer ✔✔ A type of high load multi rotational bearing. Allows
rotation
Load Path Redundancy - Correct Answer ✔✔ A bridge having three or more main load-
carrying members.
Internal Redundancy - Correct Answer ✔✔ Creation of multiple load paths by elements
that are mechanically fastened together.
Disk bearing - Correct Answer ✔✔ Bearing allows rotation and May allow translational
movement. Similar to pot bearing. Difference is bearing device
Enclosed bearing - Correct Answer ✔✔ Bearing Cannot adequately be evaluated
Fixed bearing - Correct Answer ✔✔ Restricts horizontal or translational movement. Only
allows rotation
Pinned rocker bearing - Correct Answer ✔✔ Example of moveable bearing
Abutment - Correct Answer ✔✔ the substructure at the ends of a bridge span or dam
whereon the structure's superstructure rests or contacts.
