Fred T. Hodgson · Frederick J. Drake and Co. · leaf 359
5 and levelled off with a straightedge as shown in Pig. 7,leaving one-half to 1 inch for the wearing surface.Three-eighths inch sand joints are provided at intervalsof 6 to 8 feet to prevent expansion cracks, or, in case ofsettlement, to confine the cracks to these joints. This isdene either by… … Details of concrete walk construction. NO. 7. Care must be exercised to prevent sand or any othermaterial from being dropped on the concrete, and thuspreventing a proper union with the wearing surface. Nosection should be left partially completed to be finishedwith the next batch or left until the…
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