Batter Boards, Concrete, & Masonry Flashcards Preview

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

Flashcards in Batter Boards, Concrete, & Masonry Deck (35)
Loading flashcards...
1

Calculating a Diagonal

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

2

Calculating decimals into inches

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

3

Batter Board considerations

-Building site
-fundation
-substructure
-superstructure

4

Building Site considerations

-Drainage
-Slope
-Soil Stabilization
-Tactical emplacement
-CDRs desire

5

Batter Boards

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

6

Batter Board Steps

- temporary markers
- batter boards
- level
- string line
- adj. string line
- adj. markers (Plumb bob)

7

Squaring Methods

-3,4,5
- Carpenters Square
- Diagonal method (most accurate)

8

Concrete Composition

-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

9

Aggregates and sand need to be...

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

10

Max size of coarse aggregate

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

11

Types of Portland Cement

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

12

Calcium Chloride

Accelerates the curing process, adds strength gain by 2%

13

Shipping

1 bag = 94 lbs = 1 ft3 of loose measurement
1 barrel = 376 lbs = 4 bags

14

"Warehouse pack"

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

15

Types of Concrete

Reinforced
Prestressed
Precast
Light weight

16

Desirable properties of quality concrete

Plastic state
-readily moldable
-changes shape slowly
-workable
-uniform

17

Construction Joints

Expands and contracts w/ moisture and temp changes

18

Control Joints

Cuts made to control where the concrete cracks when curing

19

Expansion joint

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

20

Slump test

pour concrete into cone, remove cone, measure drop
-to figure out how much water is in a concrete mix

21

Hand mixing sequence

1 part portland cement
2 parts sand
3 parts gravel

22

3/2s rule (Estimating Material)

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

Forms

Hold concrete until it sets

24

Elements of Wooden Forms (WALLS)

-sheathing
-studs
-wales
-strong backs
-braces
-shoe plates
-spreaders
-tie wires

25

Elements of Wooden Forms (column)

-sheathing
-batten
-yokes
-bracing

26

Masonry definition

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

27

Concrete Block

-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

Cinder Block

25-35 lbs
non load bearing

29

Factors affecting Bond strength:

-Type of mortar, M,S,N,O
-quality
-workability or plasticity
-water retention
-surface texture of the mortar bed
-quality of workmanship

30

Desirable Properties of mortar

-plasticity
-water retentivity
-strength and durability