5/16”, PETRARCH ARCHITECTURAL WALL PANELS APPLIED OVER A STUDWALL BY MEANS OF A FIELD ASSEMBLED FACE FASTENED SYSTEM

BACK-UP FRAMING

Petrarch panels can be installed using screws through the face to a variety of back-up framing systems including steel studs/furring (min. 18 ga.), wood framing/furring, or plywood (min. 5/8”). Vertical or horizontal framing must be provided at maximum 24” centers. Further details may be obtained from CEP Panels, Inc.

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The number of screw locations required will depend on the panel size and the dead and wind loading. Screws are required at maximum 24” centers providing adequate holding to carry the dead weight of the panel and wind loading (suction) up to 40 lbs. per square foot. For high wind load conditions over 40 lbs. sq. ft., fastener spacing may be required at closer centers than 24”. For all normal applications, the edge distance for countersunk screws should not be less than 1” from any edge. At corners, the distance should be 1” from one edge and 2” from the other (see illustration at left).

Normal on-site drilling can be carried out using a portable, hand held, pistol drill fitted with a masonry bit or a special countersunk tool (available from CEP Panels, Inc.) suitable for drilling at speeds of 900-1200 rpm. It is important that the hole is drilled straight and the drill is kept perpendicular to the panel. A drill guide is recommended.

Tool for Drilling and Countersinking

The hole size should be 1/16” larger than the screw diameter and the face of the screw should be 1/16” below the surface of the panel. It is very important not to over drill the countersink. The 1/16” dimension to the top of the screw head is very important if effective hole filling is to be achieved.

After installation, the screw is then disguised with the color matched hole filler. This material has been carefully formulated to match the physical characteristics of Petrarch panels and, if used in accordance with the instructions provided, will satisfactorily disguise the screw head.

No. 10-16 x (length to suit), Phillips or Square Drive, Flat Head, Tek Point, 410 Stainless Steel.

No. 10 x (length to suit), Phillips or Square Drive, Flat Head, Type A Point, 18/8 Stainless Steel, SMS.

Screw length may vary if panels are installed with a sheathing back-up (e.g., gypsum sheathing) directly to plywood or for other job site conditions. The screws shown are for countersunk fastening suitable for drilling speeds of 1900-2500 rpm.

Details of pull-out values of screws in various studding materials are available upon request.

variety of exposed stainless steel fasteners in various head designs are available. The incorporation of stainless steel bonded neoprene sealing washers or grommets is recommended. Contact CEP Panels, Inc. for samples.