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A door recess on HS wall to accommodate the protrusion of the HS door handle when the HS door is fully open is allowed provided that (See FIGURE 2.13)
a. The dimensions are not larger than 160mm (length) x 80mm (height) x 40mm (depth) for HS wall of minimum 250mm thickness.
b. The spacing between the HS door handle recess and the external/ or internal socket points shall be at least 300mm apart.