STATE GEOLOGIST, 221 
SPECIFICATIONS FOR CONCRETE CURB. 
The specifications in use in Peoria, Ills., are as follows: 
: SPECIFICATIONS FOR CONCRETE CURB. 
1. The curbing herein specified shall be constructed on................. 
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ewe mCONCLEvemCULDe Shale per curso rsrecive cre itelsvn ales uv ale imetons inches in 
thickmesswam Gerwerw recone wetstscetcr ees inches wide, with the upper face corner 
rounded to a radius of one and one-half (1144) inches. 
3. The curb shall be constructed on the ground in alternate sections, 
and the top edge shall conform to the line and grade given by the Engineer. 
4, After the necessary excavation has been made along the line of the 
proposed curbing, there shall be laid a foundation of cinders twelve (12) 
inches wide and six (6) inches in thickness after being compacted; this bed of 
cinders to be flooded with water and thoroughly rammed to a true and even 
surface with a hand rammer weighing not less than forty (40) pounds. 
5. Upon this bed of cinders shall be set the curb, which shall be con- 
structed so as to form a solid mass, divided every seven (7) feet of its length 
into separate stones, and the concrete portion of which shall be composed 
of one (1) part best imported Portland cement, three (3) parts clean, sharp, 
well-screened sand, and five (5) parts hard limestone or granite crushed to 
such size that the fragments shall not be larger than one (1) inch in the 
greatest dimension. 
6. A facing one (1) inch in thickness shall be constructed on the top 
and street face of the curb for a distance of.............. inches from the 
top. This facing shall be composed of one (1) part best imported Portland 
cement and one and one-half (11%) parts fine granite screenings, and shall 
be carried up simultaneously with the concrete, same’ being plastered upon 
the front board of the frame immediately previous to placing the concrete. 
After the frame has been removed the facing shall be neatly troweled to a 
true, smooth surface. } 
7. The crushed granite shall be entirely free from dust or dirt, and 
broken to such size that no piece shall exceed one-fourth (4%) of an inch in 
its greatest dimension. 
8. The curb shall be protected from the sun and wind by a covering 
of canvas or plank, or sprinkling it with water for at least twenty-four hours 
after completion. 
9. The finished curb shall be of a uniform color, and sections which 
do not correspond in color with the remaining portion of the curb must 
be replaced. Any spalling or splitting off whatever of the finished surface of 
the curb, either at the joints or in the body of the stone, will be sufficient 
cause for rejection, and any rejected stone must be removed and replaced with 
a new one immediately. No patching, of any character, will be permitted. 
10. The Contractor will be required to enter into a bond to guarantee 
the curb for a period of five (5) years after the completion and acceptance 
of the work against any settlement, cracks, discolorations, or any other 
defects due to bad materials or faulty workmanship which shall appear therein 
within the above period. 
11. Circular curb stones will be constructed in the same manner as 
straight curb at the entrance to all alleys and driveways, and at the corners 
of all intersecting streets. 
12. The sand and cement shall be thoroughly mixed dry in a tight mortar 
box and then made into a mortar of proper consistency and thoroughly: worked 
