(A) Unless otherwise provided by the detailed plans, steel side and curb forms will be required to form the back of all slabs and curbs except where street returns of small radii or other special sections make the use of standard steel forms impractical.
(B) (1) Side forms shall have a depth equal to or greater than the prescribed edge thickness of the pavement slab. They shall have a base width of not less than eight inches for all forms eight inches or more in height. All side forms less than eight inches in height shall have a base width of not less than six inches. The minimum length of such section of form used shall be ten feet.
(2) Each section of form used shall be straight, free from bends or warps and shall be thoroughly cleaned and oiled each time it is used before concrete is placed against it. The method of connection between sections shall be such that the joint formed shall be free from movement in any direction. Forms shall be of such cross section and strength and so secured as to resist the pressure of the concrete when placed and the impact and vibration of any equipment which they support without springing or settlement.
(C) Wooden forms may be used for paving only when specifically provided for on the plans or in special provisions with the exception that their use is herein approved for all curves having a radii of less than 150 feet. Wooden forms for use on tangents shall be dressed on one side three inches in thickness, equal in depth to the edge thickness of the work prescribed and shall have a minimum length of ten feet. Wooden forms for use on curves shall be dressed on one side and equal in depth to the edge thickness of the pavement. The forms shall be firmly nailed or secured to the side stakes and securely braced at all points where necessary so that no movement will result from pressure of the concrete or the impact of the tamper and finishing work.
(D) All other material and methods of constructing shall have the approval of the engineer.