All forms shall be made of rigid metal or straight and sound lumber not less than one and one-half inches in thickness. Forms shall be free from warp and of sufficient strength to resist springing out of shape. All forms shall be thoroughly cleaned and oiled before the concrete is placed. The forms shall be securely staked to the established line and grade.
(Ord. 14-3, passed 2-14-1972) Penalty, see § 93.99