BC

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Author:
eaglejay
ID:
111484
Filename:
BC
Updated:
2011-10-23 17:30:13
Tags:
Building construction
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Description:
Foundations
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  1. 2 types of foundations
    • Shallow and deep
    • Shallow foundations frequently use footings to transfer weight to soil; wall footing defined as the part of the building that rests on the bearing soil and is wider than the foundation
    • column footing-square pad of concrete that supports a column
    • Deep Foundations are more costly than shallow; utilize piles and pliers
    • piles- are driven into the ground and develop their load carrying ability either thru friction with surrounding soil or by being driven into contact with rock
    • pliers- are constructed by first drilling or digging a shaft and filling it with concrete.
  2. Difference between shoring and underpinning?
    Underpinning is permanent
  3. Solid lumber sizes for boards, dimension lumber, and timbers
    • Boards have a nominal thickness of 2 inches or less
    • Dimension lumber has thickness of to 2 to 4 inches or more(8 to 18ft)(roof rafters24ft)
    • Timbers have a nominal thickness of 5 inches or more
  4. Laminated wood members are produced by joing flat strips with glue.
    Beams produced like this are called?
    Sizes and shapes may also be made(curves)
    can be produced from __ to __ inches in depth and up to ___ft in length
    • Glulam beams
    • 3 to 75 inches in depth
    • 100ft in length
  5. What are the 3 types of wood joints?
    • Butt joint- not used where tensil forces are present
    • Scarf Joint- scarf and finger are used where tension and tensile are present
    • Finger joint
  6. wood panels include
    • plywood-commonly 1/4" to 1 1/8' thich, 4X8 sheet
    • nonveneered panels
    • sandwich or composite panels
  7. Types of nonveneered panels
    • OSB, particleboard, waferboard
    • particleboard used for flooring, 8' X 40'
  8. Manufactored components
    Trusses- light frame- 2inch nominal lumber alighned in a plane usually connected by gusset plates
    heavy timber truss- are made up of members up to 8 or 10in thick
    wood i-beams- frequently used for floors also rafters
  9. 2 main ways to treat wood with fire retardent?
    • surface coating
    • pressure impregnation-permanent
    • *all treatment decrease strength
  10. Chemicals used in fire retarding
    AABZSB
    • Ammonium Phosphate, Ammonium Sulfate
    • Boric Acid, Zinc chloride
    • Sodium dichromate
    • Borax
  11. Main application of thermoplastic composite lumber
    • Outside decks and railings
    • maind adv is resistance to weathering
    • flame spread rating 80
  12. Heavy Timber framing
    columns not less than 8X8's and beams not less than 6X10's
  13. Post and Beam framing
    • columns and beams greater than wood frame yet lesser than heavy timber
    • posts are usually 4X4 or 6X6 and spaced 4 to 12 feet
  14. Light wood frame
    • either Ballon Frame or Platform frame
    • 2X4's or 2X8's spaced 12, 16, or 24 inches
  15. Brick Veneer framing
    • adds little structural support
    • must be tied at intervals of 16 inches
    • every 6th course is a header course
  16. Nonreinforced masonry construction is limited to what height?
    6 stories
  17. Mill construction
    • Floors are required to be 3inch tongue and groove with 1 inch nominal tongue and groove flooring
    • Roofs are required to be 2 inch tongue and groove or 1 1/8'' structural panel or planks
    • non-bearing partitions and walls are required to be not less than 2 layers of 1 inch matched boards or laminated construction 4 inches thick or 1 hr FRR
  18. 3 common types of concrete slabs
    • flat slab- thickness 6" to 12"
    • slab and beam
    • waffle construction
    • solid slabs are short spans, up to 30ft
    • tee slabs are up to 120ft
  19. 3 common roof types
    • Flat-easiest to work on
    • pitched- low slope 3/12, medium slope 4/12 to 12/12, too steep 18/12
    • curved- takes on structural form used to support it
  20. Roof type
    slopes in one direction
    shed
  21. roof type
    consists of two inclined surfaces that meet at highside and form a ridge
    gable
  22. roof type
    slopes in 4 directions; degree slope similar to gable roof
    hip roof
  23. roof type
    Slopes in 2 directions but has a break in slope on each side; functional because space created by roof can be used as an attic or living space
    gambrel
  24. roof type
    has break in slope on all 4 sides
    Mansard
  25. roof type
    slopes in two directions that meet at lower eaves
    butterfly
  26. Roof type
    raised section along the ridgeline
    monitor
  27. roof type
    shaped in form of sawteeth
    sawtooth
  28. Fink Truss
    commonly 2X4's or 2X6's spaced 2 to 4 feet apart
  29. Roof coverings
    Vapor Barrier
    Thermal insulation
    • Vapor Barrier is designed to reduce the diffusion of interior moisture into the insulation layer; a continuous sheet of plastic, aluminum foil, kraft paper with asphalt
    • Thermal insulation reduces heat loss thru roof
  30. Membrane roofing
    • membrane that is waterproof to keep out rain and snow
    • 3 general categories, built up, single ply, fluid applied
  31. Air inflated or air supported structure
    • Airlocks or revolving doors
    • obviously limited to 1 story
    • interior pressure only slightly greater than atmosphere

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