13-132-410 Foundation caissons – Steel casings.

   (a)   General. Temporary or permanent casing shall provide sufficient strength to support or resist any loads to which the casing may be subjected.

   (b)   Permanent casing as provided in Section 13-132-400(b) of this Code:

      (1)   Steel casing shall comply with the specifications of ASTM for welded and seamless steel pipe (A252-63T.)

      (2)   No compressive stress shall be allowed in steel casing.

      (3)   Permanent casings shall have a minimum thickness of .0075 of the diameter of the caisson.

      (4)   Welded splices in steel casing shall develop the required strength of the shell material as determined by the Structural Engineer or Architect.

      (5)   Suitable provision shall be made for transferring stresses from the column into the caisson.

   (c)   Corrosion. If evidence of corrosion exists, an investigation of this condition shall be made as part of the design to determine the probable extent and penetration of the corrosion. Appropriate designs shall be provided to account for the corrosive condition.

(Prior code § 70-12.3)