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Plank Walks

nails, inches, walk and planks

PLANK WALKS. In the past plank sidewalks have been very common, but owing to the increasing cost of lumber and to the introduction of bricks for walks, they are much less common now than formerly. There is great variety in the forms of con struction employed; but as a rule the design is poor, little or no attention being given to the conditions necessary to secure durability. However, the standard plank sidewalk adopted by the City of Omaha. Neb., in 1899, is an exception. Fig. 161, page 619. shows three views of the standard 6-foot walk. The specifications for plank walks in Omaha are as follows: * Plank walks shall be built in accordance with the standard general plans hereto attached [Fig. 161], to the exact height and line given by the engineer. The stringers shall not be less than 12 feet 'long. except when necessary at the end of the walk, and shall break joints and be placed on bricks not more than 6 feet apart, resting upon a solid foundation. The stringers shall be cut square at the ends,* and shall be closely fitted at the joints; and each joint shall be toe-nailed with two nails 4 inches long. This part of the work shall be accepted by the City Engineer before the planking is laid.

"All lumber shall be white pine, square edged, and shall grade as No. 1. The planks shall have a width of not less than 8 inches, nor more than 12 inches. a uniform thickness of not less

than 2 inches. and a length equal to the full width of the walk. The planks must be laid with a }-inch air space between them. and there shall be a space of at least 4 inches between them and the ground. The planks shall be nailed at each intersection with two nails for 8-inch planks and with three nails for planks more than 8 inches wide. The nails shall be 4 inches long, and shall be either cut nails weighing twenty to the pound or wire nails weigh ing thirty to the pound, with heads inch in diameter. The nails shall be driven in the center of the stringer, and the heads shall be driven inch below the surface of the plank. Any lum ber split or otherwise injured in construction shall be removed and be re-placed with good material.

"At each edge of the walk shall be securely fastened a No. 10 galvanized iron wire, with a wire staple in each end of each plank." Cost. In Omaha in 1899, plank cost $19 per thousand feet board measure, and sills $22; labor exclusive of excavating and grading, $11 to $12 per thousand feet of lumber; wire and stapling 1} to 2 cents per lineal foot of walk. A 6-foot walk com plete cost 39 to 40 cents per lineal foot.