Reshores of wood or metal shall be screw adjusted or jacked and locked and wedged to make them secure. Reshores shall not be jacked or screwed so tightly that they preload the floor below or remove the normal deflection of the slab above.
Reshores within 10 feet (3048 mm) of an unenclosed perimeter of a building shall be secured to prevent them from falling off the building.
Wedges shall not be used within 10 feet (3048 mm) of the façade or at such other locations as determined by the commissioner.
In no case shall shores be so located as to alter the pattern of stresses determined in the original structural analysis or to induce tensile stresses where reinforcing bars are not provided.
Reshores shall be perpendicular to the surface that they are supporting.
Adjusting devices shall not be used if heavily rusted, bent, dented, rewelded or having broken weldments or other defects.
Metal shoring and accessory parts shall be fully operative when in use.