masonry estimates
TRANSCRIPT
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 1/17
CHAPTER FOURTEEN
MASONRY
PRESENTED BY:
MUHAMMAD USMAN AKRAM
CE & M 11
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 2/17
Masonry Units
Masonry units that are commonly used
for construction include brick,
concrete masonry units , and stone, either
natural or artificial.
Masonry units are available in several
sizes, grades and textures
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 3/17
Estimation the cost of Masonry
In estimating the cost of a structure to be
constructed entirely or partly of masonry
units , the estimator should determine
separately and cost of each kind of unit
required.
The quantities of masonry units should
include an allowance for waste .
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 4/17
Mortar
Mortar for masonry units is made by mixingPortland cement with lime or masonry cement ,and sand.
Sand acts as a filler and also contributes to thestrength of the mix.
Mortar is designated as ASTM types M,S,N,Oand Pl.
The M type is high-strength, The S type used for structures requiring high flexural bond strength ,The N type mortar is used in medium-strength,The type O is used in low strength.
Colored mortar is obtained by adding a color
pigment to the mortar mix. The cost is minimal
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 5/17
Size and Quantities of Bricks
Manufactured in many shapes, sizes,
colors and texture.
The costs are usually based on 1000
units.
Bricks are designated as non modular or
modular
Non modular bricks are solid bricks ,used
for load bearing walls.
Standard size of non modular bricks is 2¼
in. hi h,3¾ in. dee and 8 in.lon .
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 6/17
Size and Quantities of Bricks
Cont.
Modular Bricks have three and more holes
Normally used for non load bearing walls
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 7/17
Pattern Bonds
Oriented in Various positions for construction
of walls
Laid with long dimension in horizontal
place is called stretcher
Laid with long dimension in vertical place
is called soldier
Laid with their ends exposed to exterior is
called header
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 8/17
Pattern Bonds
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 9/17
Types of Joints for Brick
Masonry
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 10/17
Estimating Mortar For Bricks
The quantity of brick required per square
foot of wall will depend on the size of brick
and size of horizontal and vertical mortar
joints.
Actual manufactured sizes of these bricks
is less than the nominal dimensions.
Volume per brick
Volume per brick= (L + H + t) x t x D
Most estimators add 20 to 25 percent for
mortar waste
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 11/17
Cleaning Brick Masonary
Brick masonry can be cleaned by several
methods
Bucket and brush by hand
High water pressure cleaning
Sand Blasting
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 12/17
Labor Laying Bricks
The labor-hours required to lay bricks vary
with a number of factors
Quality of Work
Type of bricks
Kind of mortar uses
Shape of walls Bond Pattern
Weather Conditions
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 13/17
Concrete Masonry Units
Concrete masonry units (CMUs) are
concrete blocks that are manufactured in
various sizes from Portland cement, sand,
and gravel, or cement and lightweightaggregates
Can be either solid or hollow
The most common nominal size of a CMU
is 8 in. x 8 in. x 16 in.
The actually size usually will be 3/8 in.
less than nominal sizes.
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 14/17
CMU are laid by masons.
Bond Beam
A mason and a helper working to gather should be able to install 15 lin ft of bond
beam per hour.
Expansion or control joints
Concrete Masonry Units Cont.
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 15/17
Stone Masonry
Several kinds of stone, both natural and
artificial are used in structures such as
buildings, walls,….etc.
Natural stones used for construction
includes
sandstone,limestone,dolomite,marble,….e
tc.
The mortar is similar to that used of brick
masonry.
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 16/17
Cost of Stone
The cost of stone depends
Kind of Stone
Methods of Stone Cutting Location of Use
7/28/2019 Masonry Estimates
http://slidepdf.com/reader/full/masonry-estimates 17/17
Thank You