Estimating Labor Required

[Sidenote: Placing Brick and Tile]

The usual method of estimating the labor bill for brickwork or

tile is to reduce it to the amount per thousand brick or tile

placed, which not only covers the bricklayers' time, but the

mortar, the necessary labor for mixing it, and the labor tending

the bricklayers. This, of course, varies in different localities

and with the different kinds of brick or tile, mortar, and joints.

The contractor is urged to keep an accurate record of the number

of brick or tile laid per day, the amount of mortar of various

kinds used, and the number of bricklayers for which one laborer is

necessary, so that he may determine for himself, from the total,

the unit costs per thousand for placing brick or tile according to

different specifications.

It must be carefully noted that such items as arches, piers,

panels, special bond patterns, etc., require additional time for

execution, depending upon their nature. The contractor will have

to be guided by his own experiences in making allowances for the

additional labor necessary for this work.

[Sidenote: Building a Fireplace]

It is difficult to estimate the labor required for building a

fireplace, due to the variety of designs and the necessary amount

of cutting and fitting required. Therefore many masons estimate

this work at so much per fireplace or at a unit price per thousand

brick. It may be said that a bricklayer should lay the face of a

fireplace 5 to 6 feet wide and 4 to 5 feet high in ten hours, and

the fire brick lining in from 4 to 6 hours. It will take about 4

hours' time to lay the entire hearth. One-half hour of laborer's

time should be allowed for every hour of bricklayers' time.

[Sidenote: Cleaning Brickwork]

The cost of cleaning and pointing face brickwork will vary with the

kind of brick to be cleaned, as it is easier to clean brick with a

smooth surface than with a rough texture. An experienced man should

clean 95 to 100 smooth brick or 75 to 80 rough brick per hour.

[Sidenote: Waterproofing Foundation Walls]

For one-half inch plaster coating, composed of one part Portland

cement to two parts sand, 2 bags Portland cement and 4 cubic feet

of sand will be required to cover one square, that is, 100 sq. ft.

of wall surface, and it will require one-half hour of laborer's

time for mixing. An experienced workman and helper should cover

from 40 to 45 sq. ft. of surface per hour.

For a coating either of hot asphalt or of pitch, to be well applied

with a heavy mop, approximately 200 pounds of material and a half

day for two men will be required to cover 10 squares of wall

surface. About one gallon of creosote sizing would be required per

square, with only one-half to a quarter as much labor as for the

waterproofing.

A manual of face brick construction · 第 113 / 156 题