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108 Cards in this Set
- Front
- Back
design-bid-build
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design & construction in 2 phases
architect hired to make documents to coordinate construction called "legal tender" |
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legal tender
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construction coordination documents purchased by the owner as part of a contract--> binds architect to terms
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design build
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for simpler projects, owner seeks both design and construction from one source
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construction manager
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coordinates/oversees all aspects of project-hiring architect, consultants and builders
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Fast track
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construction begins before design is finished
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cradle to grave
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something is reprocessed/repurposed instead of going to a landfill
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embodied energy
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the amount of energy used to produce the product (mining, digging, creating, transporting)
steel is most ______ bc it uses tons of water and electricity |
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LEED
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leadership in energy and environmental design
sustainability checklist |
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Net zero energy
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produce more/equal energy than it uses
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occupancy group
A(1-5) |
assembly (theater, church, terminal, clubs, restaurants, lecture halls)
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occupancy group
B |
business
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occupancy group
E |
educational
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occupancy group
F (1,2) |
factory/ industrial (moderate and low)
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occupancy group
H (1-5) |
hazardous (detonation,deflagration,physical health)
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occupancy group
I (1-4) |
Institutional (residential, incapacitated, restrained)
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occupancy group
M |
Mercantile
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occupancy group
R (1-4) |
residential (hotels, multi-family, 1+2 family & multiple single family)
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occupancy group
S (1,2) |
storage (moderate and low)
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occupancy group
U |
utility
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occupancy groups
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use of building
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construction type
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determined by the International Build Code (IBC)
depends on fire resistance in hrs of specific components of construction assembly that provide structure & fire separation |
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construction type
Type 1 (A+B) |
non combustible/protected
-concrete, masonry, fire protected steel most fire resistant |
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construction type
Type 2 (A+B) |
non combustible, protected/unprotected
-combos of steel,concrete precast, masonry less fire resistant bc structural parts |
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construction type
Type 4 (A+B) |
combustible/non combustible
heavy timber as main structure hybrid |
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construction type
Type 3(A+B) |
combustible/non combustible
combos of wood, steel, masonry, pre cast hybrid |
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construction type
Type 5 (A+B) |
combustible protected/unprotected
light wood frame least resistant |
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Fire resistance rating
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measured in hours, how long it takes for building to fail
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ADA
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Americans with Disabilities Act
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OSHA
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Occupational Safety & Health Act
workers rules & regulations for job sites |
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ASTM
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American Society for Testing and Materials
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CSA
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Canadian Standards Association
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ANSI
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American National Standards Institute
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CSI
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Construction Specification Institute (produces master format spec)
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Specifications
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ASTM & masterformat
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Shop drawings
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produced by fabricators
detailed with dimensions |
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Building constraints
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availability of land, availability of workforce, environmental conditions, infrastructure, climate, available technologies, soil conditions, structural spans, availability of materials, laws, BC & regulations
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Zoning
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what can be built where
protects the quality of life (no schools next to factories) and controls density |
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Zoning Ordinances
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types of building uses/activities, area of building, setbacks from property lines, # parking spots, total Floor Area permissible (FAR), building height, non combustible construction
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Building code intent
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protect public health and safety by setting a minimum standard of construction quality
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early means of fire protection
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clay tiles, concrete, plaster over structural assemblies
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What are 3 requirements for a successful foundation?
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1-The foundation & underling rock/soil must be safe against a structural failure 2-foundation must not settle such a way to damage structure of building 3- foundation must be feasible economically & technically & should not cause damage to surrounding structures
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Differential settlement
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worst settlement
differential forces exerted on structure which can result failure (zigzag) |
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Uniform settlement
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even around the building is designed for, wherein the building settles evenly
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dead loads
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weight of the frame, floor, walls, ceilings, materials, electrical & mechanical equipment and foundation
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live loads
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people, furnishing, equipment, snow, ice, roof water
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wind loads
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cause lateral downward & uplift forces upon a structure
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soil type
Rock |
continuous mass of solid mineral matter such as granite or limestone which must be drilled or blasted
strongest & most stable material to place building on |
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soil types
soil |
any sub ground material that is in the form of:
boulders, cobbles, gravel, sand, silt or clay soils are never homogeneous |
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soil testing
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samples taken to represent condition of site
test for bearing compacity, permeability & liquid plastic limits digging-shallow, boring-deep |
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strength of soils in order from strongest to weakest
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bedrock, gravel, sand, clay, silt, organic material
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soil report
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given to arch/engineer--> foundations are then designed according to estimated total load of requirements of building
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excavation shoring
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site is prepared and made safe for permanent construction of foundations
temporary/permanent structure needed to hold earth |
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excavation sheeting
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provides a safe work zone for foundation construction using some kind of brace
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bracing- crosslot
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beams go across entire excavated area (like grid)
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bracing- rakers
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angled beams put in to hold back earth
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bracing- tie backs
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most preferable because of mobility and site access
technique of bracing sheeting systems against soil and water pressure |
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Soldier beams
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vertical posts for excavating
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lagging
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horizontal boards for excavating
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sheet piling
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material driven into earth by force, creates continuous wall of interlocking segments
soil is excavated after piling driven into place temporary or permanent |
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slurry wall
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permanent excavation system
"clamshell" bucket follows concrete guide to dig trench, trench is dug to required depth through slurry (this retains earth), reinforcing steel lowered into trench, concrete pumped in slurry pumped out, after concrete cured, earth excavated and tiebacks are drilled |
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dewatering
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keep excavation sites dry when excavation is carried out below the water table
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What is the liquid limit of a soil?
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the water content at which the soil passes from a liquid state
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What is the plastic limit of a soil?
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the water content at which the soil loses its plasticity and begins to behave as a solid
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Substructure
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part of the building that rests on the foundation
(below ground) |
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superstructure
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above ground portion of building
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shallow foundations
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transfers load to the earth at the base of the column or wall of the substructure
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deep foundation
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penetrate through layers of upper "incompetent" soil in order to transfer loads to competent bearing soil/bedrock below
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Footings
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spreads the load of a structural wall or column into the ground
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slab
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a thin footing that distributes smaller loads to the perimeter
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caissons
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drilled, deep foundation
permanent supports |
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pile
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driven, deep foundation
create pressure bulbs in unstable soil--> pile fields |
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underpinning
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way to repair foundation, very expensive
add extra supports to existing foundation |
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backfilling
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after you excavate to build a structure, go back and fill in holes around the foundation
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concrete make up
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aggregates (gravel/crushed stone, sand), portland cement, clean water, admixtures (performance enhancing ingredients)
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portland cement
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clinker mixed with gypsum to retard curing and ground up again
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clinker
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limestone, clay/shale and other raw materials ground up, proportioned, blended (wet or dry) and burned
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aggregates
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3/4 concrete mixture, small/light pieces of mixed minerals like shale
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curing
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setting and hardening of concrete by hydration
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hydration
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chemical reaction referring to what happens when water meets concrete
~28 days, must be kept moist during curing |
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4 rules for making high quality concrete?
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1 use clean, sound, properly sized ingredients, 2 mix ingredients in proper proportions, handle wet concrete properly to avoid segregating, cure concrete under controlled conditions
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what is the compressive strength of concrete needed for shallow foundations?
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as low as 2000psi
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what is the compressive strength of concrete needed for columns needed in high rise building?
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as high as 22000 psi
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How does the water/cement ratio affect the strength and surface quality of the concrete that is produced?
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More water than concrete is needed for the curing, need concrete mix to flow through pumps,
the less water the denser and stronger the concrete will be |
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air entraining
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bubbles in concrete makes it easier/lighter to work with
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admixtures
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performance enhancing chemicals or controlling ingredients
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slump test
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test concrete consistency, concrete put in mold, flipped upside down and allowed to fall under its own weight, distance moves is measured
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W-C ratio
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strength of concrete is dependent on cement to water ratio
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formwork
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forms used for shaping concrete, must be strong enough to support weight of wet concrete and itself
made of wood,metal or plastic, holds reinforcing bars in place |
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formwork ties
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bind the formwork securely together and provide strength to resist the weight and pressure of the concrete when poured
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reinforcing bars
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come in diameter sizes at 1/8", made of steel,
place the steel in the concrete where there are tensile forces |
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stirrup
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carry diagonal tension
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post tensioning
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done on site
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pre tensioning
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done off site
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camber
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mild arc
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one way system
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only 2 lines of parallel support and a single load path in one direction (column lines or walls) (ex. ribbed, solid slab with bands, skip joist)
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two way system
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involves support working in 2 directions and load traveling in 2 directions (ex. waffle, solid slab, drop panels, flat plate)
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ribbed slab
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thick beam in center (at column line) and ribs coming off it
repetitive steel pans (1 way) |
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waffle slab
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joisted system with column head
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mushroom column
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2 way system, column with flat slab at top
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slab band
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thick, flat bands
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slab on grade
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footings needed by little or no foundation is poured
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flying formwork
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sections of floor are poured using formwork mounted to large steel trusses, reused for each floor
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tilt up construction
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cast on ground then raised up into position (usually used for 2 story structures)
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sheeting
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excavation prevent soil from caving during digging
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pile caps
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used for repair/improvement of existing foundation
transfer loads from building to piles |
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well points
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pump water out
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water tight barriers
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permanent water proofing
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prestressing concrete
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(pretension and post tension) reduce compressive forces and increase tensile forces
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