198 ANNUAL REPORT 
SPECIFICATIONS FOR CONCRETE SIDEWALKS, 
The following represents a good specification form for sidewalk 
construction as prepared by the writer: 
Hstimate No........ INOS OL Streete.s. 
Ordinance Page........ INOFOLeWwettinewa een 
SPECIFICATIONS. 
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Requirements,—All sidewalks shall be —— feet, inches (— ft. 
-——— in.) in width, the top of said walks when complete to be at the grade 
established by the engineer, with a slope of one-fourth inch to the foot 
toward the center of the street. All walks shall be laid with a space of 
inches between the inner edge of the walk and the lot line, except 
los7 Soserell joeraaate WEIN UNS (sooccccocounooce ) 
Proper authority. 
Grading.—All cutting and filling necessary to bring the foundation 
to subgrade, as given by the engineer, must be done by the contractor. 
Wherever the soil is clay, peat or black mold, it must be removed to a 
depth of ten and one-half (10%) inches below the finished grade and 
cinders, sand or gravel filled in and thoroughly packed, rammed or rolled 
solid to make a foundation six (6) inches thick. All foundations must be 
brought to a subgrade four and one-quarter (414) inches below finished 
grade and rammed solid before laying the concrete. Soft and spongy 
places must be entirely removed and sand filled and rammed in the place. 
Concrete, —On the foundation thus prepared shall be spread a layer 
of concrete, which shall be three and one-half (3%) inches in thickness, 
after being thoroughly compacted. The concrete shall be composed of 
one part of the best quality of Portland cement, two parts clean, coarse, 
sharp sand, and five parts of broken stones or clean, coarse gravel, of a 
size not larger than will pass through a 114 inch ring. The sand and 
cement shall first be thoroughly mixed dry, then water added and the 
mortar mixed, after which the stone shall be added and the whole mass 
again evenly mixed until every particle of stone is completely coated 
with mortar. The concrete shall be quickly placed in position and 
thoroughly rammed over its whole surface with an iron shod rammer 
eight inches square and weighing not less than twenty pounds. 
Top Dressing.—Upon this layer of concrete, before it shall have 
set, shall be spread a finishing coat three-quarter (34) inch in thickness, 
composed of one part of the best Portland cement and one and one-half 
parts torpedo gravel or other gravel satisfactory to the engineer; said 
