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PR Range 

Self-supporting Rooflight

Self supporting rooflights forming pyramids, hexagons, octagons and other custom shapes can be installed either single, 6mm -12mm, or double glazed with 24 - 28mm units.  On this application the minium suggested pitch is 25 degrees.

Lean-to Roof Glazing

The PR System is ideal for forming lean-to structures where a secondary support system is provided and 15 degrees is the suggested minimum pitch.  These lean-to structures can be either single, 6mm - 12mm, or double glazed with 24mm - 28mm units and pressed aluminium hips, valleys and gutters can be incorporated.

Span Charts

600mm Centres - Single Glazed

  Working 
  Pressure    		      I
  Section  		      I  
  Section  		      I
  Section  
   n/m2    PR2    PR3   PR4
  1250  2900  3300  3900
  1500  2650  3100  3700
  2000  2300  2650  3300

750mm Centres - Single Glazed

  Working
  Pressure   		      I
  Section 		      I
  Section  		      I
  Section  
   n/m2    PR2   PR3   PR4
  1250  2600  3000  3650
  1500  2350  2700  3400
  2000  2050  2400  2950

600mm Centres - Double Glazed

  Working
  Pressure    		      I
  Section  		      I
  Section		     Box
  Section   
   n/m2   PR5   PR6   PR7
  1250  2800  3650  3250
  1500  2700  3500  3100
  2000  2450  3400  2850

750mm Centres - Double Glazed

  Working
  Pressure   		      I
  Section		      I
  Section   		    Box
  Section   
   n/m2   PR5   PR6    PR7
  1250  2650  3400  3000
  1500  2500  3300  2850
  2000  2100  3100  2600

Spans should be measured along the pitch.

Please note thate these charts are indicative and should be used for design only.

Contact D & D Glazing (Glasgow) Ltd for spans and bar centres outwith the above.