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GRB102 Rooftop Support Block

Double block base with 20” strut

The GRB102 model features a double base with an attached 20” steel strut, adding additional load capability. Part of the G-STRUT 100 Series of rooftop support blocks, the GRB102 features the same highly visible, weather-resistant rubber bases, creating a vibration and sound-dampening, sturdy support system for rooftop applications that resists damaging your commercial roof. Have questions about the GRB102? Let the team at Gregory Strut help — reach out today.

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Product Details

Building on the base model of the G-STRUT 100 series, the GRB102 model links two heavy duty recycled tire rubber bases with a single galvanized-steel strut channel, doubling the load capacity as well as the length. Your rooftop support systems come together quicker than ever thanks to the integrated channel, which is compatible with standard strut channel fittings and clamps.

  • Double base with attached 20” strut channel
  • Pre-assembled at the factory
  • 14 gauge, 13/16” pre-galvanized steel channel
  • Compatible with standard strut channel fittings and clamps
  • 100% recycled rubber block
  • UV-resistant materials
  • Green high-visibility reflectors for safety
  • Innovative design inhibits floating and shifting
  • Freeze and thaw resistant
  • LEED certifiable product
  • Vibration dampening
  • Compatible with most rooftop materials


  • Base length: 20 1/2"
  • Base width: 5 1/2”
  • Base height: 4”
  • Height: 4 13/16” (to top of the strut)
  • Channel width: 1 3/4”
  • Channel length: 20”
  • Materials: 100% recycled rubber base, pre-galvanized 14-gauge steel channel
  • Safety: Green reflector for high visibility
  • Weight: 10.6 lbs
  • Static load capacity: 1,000 lbs.
  • Ordering: 128 pieces per skid

Proven Certifications & Associations

Group Affiliations

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AD Electrical
NetPlus Alliance

Have a question?
Contact our Vice President of Gregory Strut, Bob Porter, to discuss your questions, goals and project requirements.

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