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DESIGN AND INSTALLATION GUIDE - Cemintel
1. Drilling a number of holes around the perimeter of the opening to be formed. 2. Support edge of opening to minimise damage to sheet, and use a hammer to carefully tap out the centre. Large holes or openings are formed by: 1. Scoring around the perimeter of the opening. 2. Form a large hole in the centre as noted above. 3.
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