CONSTRUCTION NOTES 



333 



three-fourths to one-inch mesh screen. This should be spread to depth of 

 not less than three inches. The finished surface, which should be one inch 

 in thickness, should consist of equal proportions by weight of sand (to pass 

 through 3^-inch screen), pure clay (to pass through y^-inch screen) and silt. 

 One part of salt by weight to forty or fifty parts of surfacing material should 

 be added. The finishing surface should be spread by use of wheelbarrow 

 and planks and the entire surface of the court should be covered before 

 any rolling of finished surface is undertaken. 



Mr. J. B. McConaghie, landscape architect with the Pennsylvania 

 Department of Internal Affairs, recommends the following procedure in 

 constructing a clay court: "Upon a two-inch cinder foundation rolled hard 

 seven or eight inches of trap rock one 'and one-half to two inches in diam- 

 eter should be laid. On top of this should be placed two inches of trap rock 

 one-half to one inch in diameter filled with pebbles to grade. All crevices 

 should be filled with coarse sand, after which court is rolled damp and 

 given half a day to harden. On top of this surface is added one inch of blue 



TtMhlS COUBT BACKSTOPS 



Or PABN COMMIS&IONtBS MINNEAPOLIS MINN 

 May 1924 



PLATE No. 136. PLAN OF CONSTRUCTION OF TENNIS COURT BACKSTOPS, MINNEAPOLIS 



The following are the specifications for the above backstops with top and bottom rail. End posts: To be standard 

 weight galvanized tubing three inches in diameter, 13^ feet long, fitted with a neat ball top ornament. Line posts: 

 To be of standard weight galvanized tubing two and one-half inches in diameter, 13 feet long, fitted with malleable 

 tops to carry top rail. Top rail, bottom rail and end posts braces to be standard weight galvanized tubing one and 

 five-eighths inches in diameter. Truss rods braces: Used at each end of the fence, to be of three-eighths inches mild 

 steel. Fence fabric: To be Armco, Cyclone or equivalent, No. n gauge, one and three-fourths-inch mesh. Bidder 

 shall specify wire fabric contemplated, when submitting prices. Fence fittings and fabric to be galvanized. 



