(A) Steel or wooden forms may be used for sidewalks. The forms shall be smooth, straight and of sufficient strength to resist springing out of shape and of depth to conform to the full thickness of the proposed walk.
(B) Forms shall be equal in depth to the edge thickness of the walk (four inches), shall have a minimum length of ten feet and shall be well-staked and thoroughly braced and set to the established lines. Their upper edges shall conform to the grade of the finished walk, which shall have sufficient fall from the lot line towards the curb line to provide drainage, which shall not exceed one-fourths inch per foot. The setting and removing of the forms shall conform to § 5.18 of this chapter.