essay 2-3 pages Cost & Estimating

9/30/2020

1

CSMT 441

Bricks and masonry

reinforcement accessories

Lecture 10

1

2

Bricks

• Brick is a solid masonry made of clay.

• Bricks are classified by:

– kind (common or face)

– size

9/30/2020

2

3

4

Bricks

• No. of brick per square foot of wall depends on:

– size of brick (standard size: 2 1/4"x 3 3/4"x 8")

– width of the mortar joint

• For running bond with 3/8" thick mortar joint,

number of standard brick per 100 sf is 675

• Make deduction for all openings

• Waste

– 5 to 10%

9/30/2020

3

BCN5618 5

6

Mortar

• Masonry mortar usually consists of Portland

cement, mortar sand, and hydrated lime.

• 3/8" is a common mortar joint thickness, but 1/4"

and 1/2" joints are also used.

9/30/2020

4

7 Volume of mortar for brick (cf) = (Net area x 7.2)/100

8

Horizontal masonry reinforcement

• Steel reinforcing is placed continuously in the

mortar joints to minimize shrinkage, temperature,

and settlement cracks in masonry and to provide

resistance to shear.

• Unit: LF (note the size, type, plain or corrosion

resistant, and spacing).

• Add 5% for waste and 5% for lap.

9/30/2020

5

9

10

9/30/2020

6

11

Reinforcing bars

• Vertical reinforcing (to provide lateral support)

• Horizontal reinforcing in beams or blocks

• Unit: ton

12