4th Test Flashcards
What are end bearing piles
Direct support of vertical load driven vertically.
What is a fender pile
Protects docks, Piers, and bridges from impacts.
What is a dolphin pile otherwise known as a pile cluster
Surf same as Fender in multiple art tie together to maneuver ships.
What is a guide pile
Use two guide other piles
What angle is a batter pile driven at
4°-12°
What is a bent piles
2 or more piles driven in a row
What things can deteriorate a pile durability
Bugs decay marine borrowers can deteriorate durability
What is springing when driving piles
Vibrates too much.
What is bouncing when driving piles
Hammer is too light.
What are two types of cast in place concrete piles
Shell which uses a case
Shell-less which does not use a case
How long minimum should concrete cure before disturbing soil
Min 12 hours
Who can approve precast concrete mix design changes
Contracting officer or ROICC or FEAD can approve.
What is needed before driving piles into the ground
Dig permit
What is the superstructure of a bridge
The lower half.
What are the two types of bracing used on bridges
Longitudinal and transverse
What is the super structure of a bridge
The upper half of the bridge, which includes girders, stringers, decking flooring Treadway, curves and hands.
What type of nail is used on super structure construction
60D nails.
What is a jetty used for also known as brake water
Directs current flow along channels
What does a seawall do
Protects shoreline from erosion from wave action
What is a wharfage structure
Allows ships to dock in offload
What is the list limit of a floating crane
5°
What is insulation used for
Used to inhibit thermal and sound transmission
How is flexible insulation manufactured
Manufactured in bats, blankets, and rolls
How is loose fill insulation manufactured
Comes in bags.
Two types of rigid insulation
Structural which you can walk on and nonstructual
What u value is most desirable in insulation
Lowest u value
What is a b t u
British thermo unit
One b t u raises one pound of water by one degree fahrenheit
What is u value
Total heat transferred through material.
What is R factor
Thermal resistance high is desired
What is c value
Heat in btu’s by convection that passes through materials, low C is best.
How does acoustical tiles and panels work
They resist sounds with tiny airpockets
How are impact sounds carried
Carried by material.
How are reverb sounds carried
Carried by echo
What is s t c
Sound transmission class
What is the purpose of insulation
Economy and comfort
retards spread a fire
prevents excess condensation
reduces noise transfer into building.
What does a crawl space require
A vapor barrier.
What is another name for an in wall fan
Whirly bird or turbine.
When inspecting insulation what items are looking for
No wet or damp insulation.
Vapor barriers installed on warm side “interior of exterior” wall
How high can insulation be stacked
No higher than 20 feet unless authorized.
What is a gable roof
Ridge at center and slopes into directions
What is a hip roof
Four sloping slides it is the strongest roof because it has four hip rafters
What is a gable and vally roof
Intersectting at 90° angle.
What is a shed or lean too roof
One slope or pitch
How to determine types of materials needed for roofing
Influence by cost
service life
wind resistance, fire resistance
and local climate.
What is one square in roofing
Number of shingles required to cover 100 square feet of surface.
What is a top lap in roofing
Where one row of shingles overlaps row below about 7 inches.
What is exposure in roofing
About 5 inches of shingles shows.
What is slope in roofing
Incline of roof
ratio of vertical rise to horizontal run fraction of 4” inch rise for every 12” of run.
What is pitch in roofing
Incline of vertical rise to twice the horizontal run.
What is a flood coat in roofing
Top layer of bitumin poured, not mopped
Roofing felt dimensions and weight
15 feet and 30 pounds per square.
How do you store roofing felts
At 50°F or greater for 24 hours before laying.
When should you stop surface prep of roof
If weather drops below 40°F.
How far in do you hammer nails on roofing
Flush