Tandem Unit System

Acrylic Dome Unit Skylight System in Widths up to 8′ and Unlimited Lengths

Wasco’s Thermally Broken Tandem Unit System (TSST) offers virtually unlimited design possibilities for a fully customized configuration.

The TSST allows domes or dome assemblies to be combined side by side in a single frame. Domes are separated by a structural purlin and are available single or double glazed with domed or pyramid shapes.

  • For flat roof applications
  • Curb mount – for use on minimum 1-1/2″ thick site-built or prefabricated curbs
  • Double dome units meet the intent of OSHA Fall Protection standards and tested to 775 ft-lbs
  • Thermally broken extruded aluminum curb frame with integral condensation gutter and counter-flashing downward leg
  • Maximum dome sizes of 8′ x 8′
  • Equal purlin spacing (equal dome sizes)
  • Maximum unsupported purlin width of 5′ @ 30 psf positive loading, structural support required for 5′ and above @ 30 psf positive loading up to 8′ widths
  • Units ship assembled and glazed in sections up to 19’6″
  • Glazing Options
  • Finish Options
  • Safety Considerations

Single Dome

  • Domed or pyramid shapes
  • Glazing options – Clear, Bronze, or White

Double Dome

  • Domed or pyramid shapes
  • Outer glazing options – Clear, Bronze, White, or Satin Sky (limited sizes)
  • Inner glazing options – Clear or White

Retainer Finish:

Safety ConsiderationsWasco skylights are designed to withstand normal elements of the weather. They are not designed to withstand human impact or falling objects. These skylights should not be walked upon under any circumstances. The owner or designer should restrict access only to authorized personnel who have been adequately cautioned as to the location of the skylights and informed of the warning above, or said owner should provide protective guard rails or screens around the skylights.

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