(1) The location, quantity and area of the seat pad should conform to the design and current regulations.
(2) The top surface elevation of each basic pad should be determined according to the measured distance from the bottom of the column to the distance between the legs. The allowable deviation of the elevation, level and positioning of the seat pad should meet the requirements of the following table.
(3) In the steel structure, when using a slurry pad, no shrinkage mortar should be used. The strength of the mortar test block before the column is hoisted should be higher than the strength of the base concrete.