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Charlie Course > Batter Boards, Concrete, & Masonry > Flashcards

Batter Boards, Concrete, & Masonry Flashcards

1
Q

Calculating a Diagonal

A

3,4,5 or a2 + b2=c2 (pythag)

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2
Q

Calculating decimals into inches

A

multiply first by 12 (fractions of a ft) and take whole number as your inches, then multiply remaining decimals by 16 (fractions of an inch) to get your fractions of an inch

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3
Q

Batter Board considerations

A
  • Building site
  • fundation
  • substructure
  • superstructure
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4
Q

Building Site considerations

A
  • Drainage
  • Slope
  • Soil Stabilization
  • Tactical emplacement
  • CDRs desire
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5
Q

Batter Boards

A

Temporary framework used to assist in locating corners when laying out a foundation

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6
Q

Batter Board Steps

A
  • temporary markers
  • batter boards
  • level
  • string line
  • adj. string line
  • adj. markers (Plumb bob)
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7
Q

Squaring Methods

A
  • 3,4,5
  • Carpenters Square
  • Diagonal method (most accurate)
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8
Q

Concrete Composition

A

-Mixture of aggregates, sand, portland cement, water and often controlled amounts of entrained air and held together by a hardened state.
-hydration causes concrete to harden
desired temp of concrete is 73 degrees

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9
Q

Aggregates and sand need to be…

A

clean, durable, free of chemicals and free of any coating

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10
Q

Max size of coarse aggregate

A

should not exceed 1/5 of the diameter of a wall or structure

  • should not exceed 1/3 slab thickness
  • should not exceed 3/4 of the clear space between reinforcing bars
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11
Q

Types of Portland Cement

A 
1- normal or portland - takes 28 days to cure
2- modified - takes 45 days to cure
3- high early - takes 7 days to cure
4- low heat - takes 90 days to cure 
5- sulfate resistant- 60 days to cure
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12
Q

Calcium Chloride

A

Accelerates the curing process, adds strength gain by 2%

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13
Q

Shipping

A

1 bag = 94 lbs = 1 ft3 of loose measurement

1 barrel = 376 lbs = 4 bags

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14
Q

“Warehouse pack”

A

sacked cement in storage packed too tightly store off ground and cover to prevent

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15
Q

Types of Concrete

A

Reinforced
Prestressed
Precast
Light weight

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16
Q

Desirable properties of quality concrete

A

Plastic state

  • readily moldable
  • changes shape slowly
  • workable
  • uniform
17
Q

Construction Joints

A

Expands and contracts w/ moisture and temp changes

18
Q

Control Joints

A

Cuts made to control where the concrete cracks when curing

19
Q

Expansion joint

A

Pre formed, pre molded elastic resilient material, oil filled, approx 1/4” to 1/2” thick as wide as concrete is thick

20
Q

Slump test

A

pour concrete into cone, remove cone, measure drop

-to figure out how much water is in a concrete mix

21
Q

Hand mixing sequence

A

1 part portland cement
2 parts sand
3 parts gravel

22
Q

3/2s rule (Estimating Material)

A 
PV = Volume x # of structures
LF = PV x 1.05 or 1.10 depending of PV
LV = LFx 1.5 
Bags = 1/6 x LV
Ft3 Sand = 2/6 x LV
Ft3 Gravel = 3/6 x LV
#of bags x 8 = gals of water
23
Q

Forms

A

Hold concrete until it sets

24
Q

Elements of Wooden Forms (WALLS)

A
  • sheathing
  • studs
  • wales
  • strong backs
  • braces
  • shoe plates
  • spreaders
  • tie wires
25
Q

Elements of Wooden Forms (column)

A
  • sheathing
  • batten
  • yokes
  • bracing
26
Q

Masonry definition

A

To build a structure from any building materials that consist of units held together with mortar

27
Q

Concrete Block

A
  • 35-45 lbs
  • nominal dimensions 8”x8”x16”
  • actual dimensions 7.5/8”x7.5/8”x15.5/8”
  • allows for 3/8” mortar joint
28
Q

Cinder Block

A

25-35 lbs

non load bearing

29
Q

Factors affecting Bond strength:

A
  • Type of mortar, M,S,N,O
  • quality
  • workability or plasticity
  • water retention
  • surface texture of the mortar bed
  • quality of workmanship
30
Q

Desirable Properties of mortar

A
  • plasticity
  • water retentivity
  • strength and durability
31
Q

Mortar is produced in two methods

A
  • Portland cement
  • Masonry cement
  • main difference Portland cement does not contain masonry lime.
32
Q

Types of Sand

A
  • Manufactured
  • Natural
  • Sand must be in a damp and loose condition
33
Q

Control joints (masonry)

A
  • breaks masonry work into panels
  • used to prevent extensive cracking
  • rule of thumb = no greater than 25’ no thicker than 1/2”
34
Q

Wall Intersections

A

Do not intersect, join w/ control joint

35
Q

Estimate Masonry Material

A
  • Linear feet x Height x #of structure x 1.125 = # of block
  • # of block/100 x 3 = bags of masonry cement
  • # of bags/ 8 = tons of sand
  • # of bags x 8 = gals of water

Charlie Course (5 decks)

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