Cooper B-Line Dura-Blok™ Rooftop Support Solutions

Economical Support System for Raised Rooftop Applications

QZC-DBM
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What's special about these rooftop support blocks?

  • Affordable, rooftop support system available in a wide range of configurations for securely mounting pipes, cable trays, grated walkways, HVAC equipment, and other applications
  • Dependable rubber construction will not float or blow away, and delivers a longer, more reliable lifespan than wood blocks or cheap plastic imitations
  • Made from 100% recycled rubber and qualifies for LEED credits, which is ideal for companies looking to make facilities eco-friendly and reduce their footprint on the environment
  • Click for More Features

The Dura-Blok™ Rooftop Support System from Cooper B-Line is designed to provide years of reliable service in harsh outdoor environments. These specialized Dura Block roof supports are molded from 100% recycled rubber to provide a safe yet dependable base onto which a wide range of rooftop piping, conduit, and even HVAC equipment can be mounted without causing long-term damage to the roofing.

Support Bases | DB Series | DB6 Series | DB10 Series | DBE Series
DB_DS Series | DBM Series | DBR Series | Accessories

PART # DESCRIPTION LOAD CAPACITY HEIGHT WIDTH LENGTH WEIGHT PRICE
Support Bases
QZC-DBM DuraBlok Rooftop Support Base 500 lbs 4" (101mm) 6" (152mm) 4.8" (122mm) 4.48 lbs (2.03kg)
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QZC-DBP DuraBlok Rooftop Support Base 500 lbs 4" (101mm) 6" (152mm) 9.6" (244mm) 2.35 lbs (1.07kg)
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DB Series
QZC-DB5 DuraBlok Base w/ 1" High Channel 500 lbs 5" (127mm) 6" (152mm) 4.8" (122mm) 2.75 lbs (1.25kg)
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QZC-DB10 DuraBlok Base w/ 1" High Channel 500 lbs 5" (127mm) 6" (152mm) 9.6" (244mm) 5.28 lbs (2.39kg)
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QZC-DB20 DuraBlok Base w/ 1" High Channel 1,000 lbs 5" (127mm) 6" (152mm) 20.2" (513mm) 10.63 lbs (4.82kg)
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QZC-DB30 DuraBlok Base w/ 1" High Channel 1,500 lbs 5" (127mm) 6" (152mm) 30.8" (782mm) 15.99 lbs (7.25kg)
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QZC-DB40 DuraBlok Base w/ 1" High Channel 2,000 lbs 5" (127mm) 6" (152mm) 41.4" (1052mm) 21.34 lbs (9.68kg)
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QZC-DB48 DuraBlok Base w/ 1" High Channel 2,500 lbs 5" (127mm) 6" (152mm) 52.0" (1321mm) 26.70 lbs (12.4kg)
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PART # DESCRIPTION LOAD CAPACITY HEIGHT WIDTH LENGTH WEIGHT PRICE
DB6 Series
QZC-DB610 DuraBlok Base w/ 2.625" High Channel 500 lbs. 6.625" (167mm) 6" (152mm) 9.6" (244mm) 6.36 lbs (2.88kg)
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QZC-DB620 DuraBlok Bases w/ 2.625" High Channel 1,000 lbs. 6.625" (167mm) 6" (152mm) 20.2" (513mm) 12.90 lbs (5.85kg)
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QZC-DB630 DuraBlok Bases w/ 2.625" High Channel 1,500 lbs. 6.625" (167mm) 6" (152mm) 30.8" (782mm) 19.45 lbs (8.82kg)
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QZC-DB640 DuraBlok Bases w/ 2.625" High Channel 2,000 lbs. 6.625" (167mm) 6" (152mm) 41.4" (1052mm) 26.00 lbs (11.79kg)
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QZC-DB648 DuraBlok Bases w/ 2.625" High Channel 2,500 lbs. 6.625" (167mm) 6" (152mm) 52.0" (1321mm) 32.55 lbs (14.76kg)
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DB10 Series
QZC-DB10-28 DuraBlok Bridge w/ 1.625" High Channel 1,000 lbs. 5.625" (143mm) 9.6" (244mm) 28" (711mm) 13.16 lbs (5.97kg)
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QZC-DB10-36 DuraBlok Bridge w/ 1.625" High Channel 1,000 lbs. 5.625" (143mm) 9.6" (244mm) 36" (914mm) 14.36 lbs (6.51kg)
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QZC-DB10-42 DuraBlok Bridge w/ 1.625" High Channel 1,000 lbs. 5.625" (143mm) 9.6" (244mm) 42" (1067mm) 15.52 lbs (7.04kg)
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QZC-DB10-50 DuraBlok Bridge w/ 1.625" High Channel 1,000 lbs. 5.625" (143mm) 9.6" (244mm) 50" (1270mm) 16.45 lbs (7.46kg)
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QZC-DB10-60 DuraBlok Bridge w/ 1.625" High Channel 1,000 lbs. 5.625" (143mm) 9.6" (244mm) 60" (1524mm) 17.94 lbs (8.14kg)
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PART # DESCRIPTION LOAD CAPACITY HEIGHT WIDTH LENGTH WEIGHT PRICE
DBE Series
QZC-DBE10-8 DuraBlok w/ Rod Risers and 1" Channel 200 lbs. 5.5" - 8" (140 - 203mm) 6" (152mm) 9.35" (161mm) 5.68 lbs (2.58kg)
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QZC-DBE10-12 DuraBlok w/ Rod Risers and 1" Channel 200 lbs. 5.5" - 12" (140 - 305mm) 6" (152mm) 9.35" (161mm) 5.72 lbs (2.59kg)
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QZC-DBE10-16 DuraBlok w/ Rod Risers and 1" Channel 200 lbs. 5.5" - 16" (140 - 406mm) 6" (152mm) 9.35" (161mm) 5.76 lbs (2.61kg)
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  • Designed with open ends and a channel to allow for proper drainage
  • Smooth rubber composition absorbs heavy loads without becoming sharp or abrasive, which helps to extend the life of your roof and eliminate additional maintenance typically required with wooden support blocks
  • Durable yet gentle design requires no roof penetration or adhesion for installation
  • Dampens vibration from AC equipment, so there is no need for additional rubber padding or noise reduction insulation
  • 14 gauge, galvanized steel channel is through-bolted on all sizes to maintain a high level of strength and weight capacity
  • On longer assemblies, each block is spaced 1" apart to allow water to flow freely, preventing additional stress or the collection of stagnant water
  • Reflective strip on each side provides clear visibility while helping to reduce roof-related accidents

 

Dura-Blok Applications:

  • Pipe Supports
  • HVAC Supports
  • Roof Walkway Supports
  • Duct Supports
  • Conduit Supports
  • Cable Tray Supports

 

Density 0.52 oz/cu in ASTM C642
Durometer Hardness 67.2A ± 1 ASTM D2240
Tensile Strength 231 psi minimum ASTM D412
Compression Deformation 5% at 70 psi and 72° F ASTM D395
Brittleness at Low Temp -50° F ASTM D746
Freeze and thaw when exposed to deicing chemicals No loss after 50 cycles ASTM C672
Coefficient of Thermal Expansion 8 x 10 -6 in/in/ °F (min) ASTM C531
Weathering 70 hours at 120º F - ASTM D573
A - Hardness retained 100% (±5%)
B - Compressive strength 100% (±5%)
C - Tensile strength 100% (±5%)
D - Elongation retained 100% (±5%)

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Support Bases | DB Series | DB6 Series | DB10 Series | DBE Series
DB_DS Series | DBM Series | DBR Series | Accessories


PART # DESCRIPTION LOAD CAPACITY HEIGHT
(overall)
WIDTH
(overall)
LENGTH WEIGHT PRICE
DB_DS Series
QZC-DB2318DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 23" (584mm) 25.625" (651mm) 20.2" (513mm) 33.31 lbs (15.11kg)
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QZC-DB2918DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 29" (736mm) 25.625" (651mm) 20.2" (513mm) 35.00 lbs (15.88kg)
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QZC-DB4118DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 41" (1041mm) 25.625" (651mm) 20.2" (513mm) 38.40 lbs (17.42kg)
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QZC-DB5318DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 53" (1346mm) 25.625" (651mm) 20.2" (513mm) 41.80 lbs (18.96kg)
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QZC-DB2324DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 23" (584mm) 31.625" (803mm) 20.2" (513mm) 34.15 lbs (15.49kg)
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QZC-DB2924DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 29" (736mm) 31.625" (803mm) 20.2" (513mm) 35.84 lbs (16.26kg)
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QZC-DB4124DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 41" (1041mm) 31.625" (803mm) 20.2" (513mm) 39.25 lbs (17.80kg)
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QZC-DB5324DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 53" (1346mm) 31.625" (803mm) 20.2" (513mm) 42.65 lbs (19.34kg)
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QZC-DB2336DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 23" (584mm) 43.625" (1108mm) 20.2" (513mm) 35.84 lbs (16.26kg)
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QZC-DB2936DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 29" (736mm) 43.625" (1108mm) 20.2" (513mm) 37.55 lbs (17.03kg)
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QZC-DB4136DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 41" (1041mm) 43.625" (1108mm) 20.2" (513mm) 40.95 lbs (18.57kg)
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QZC-DB5336DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 53" (1346mm) 43.625" (1108mm) 20.2" (513mm) 44.34 lbs (20.11kg)
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QZC-DB2348DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 23" (584mm) 55.625" (1415mm) 20.2" (513mm) 37.55 lbs (17.03kg)
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QZC-DB2948DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 29" (736mm) 55.625" (1415mm) 20.2" (513mm) 39.25 lbs (17.80kg)
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QZC-DB4148DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 41" (1041mm) 55.625" (1415mm) 20.2" (513mm) 42.65 lbs (19.34kg)
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QZC-DB5348DS DuraBlok w/ 1.625" Vertical and Horizontal Channels 1,000 lbs. 53" (1346mm) 55.625" (1415mm) 20.2" (513mm) 46.03 lbs (20.88kg)
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PART # DESCRIPTION LOAD CAPACITY MAX. HEIGHT WIDTH LENGTH WEIGHT PRICE
DBM Series
QZC-DBM-05CT DuraBlok w/Rod Risers and 0.5" Dura Copper Clamp 50 lbs. 11.19" (284mm) 6" (152mm) 4.80" (122mm) 2.75 lbs (1.25kg)
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QZC-DBM-75CT DuraBlok w/ Rod Risers and 0.75" Dura Copper Clamp 50 lbs. 11.34" (288mm) 6" (152mm) 4.80" (122mm) 2.76 lbs (1.25kg)
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QZC-DBM-10CT DuraBlok w/ Rod Risers and 1.0" Dura Copper Clamp 50 lbs. 11.45" (291mm) 6" (152mm) 4.80" (122mm) 2.84 lbs (1.29kg)
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QZC-DBM-125CT DuraBlok w/ Rod Risers and 1.25" Dura Copper Clamp 50 lbs. 11.63" (295mm) 6" (152mm) 4.80" (122mm) 2.95 lbs (1.34kg)
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QZC-DBM-150CT DuraBlok w/ Rod Risers and 1.5" Dura Copper Clamp 50 lbs. 11.78" (299mm) 6" (152mm) 4.80" (122mm) 2.96 lbs (1.34kg)
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QZC-DBM-20CT DuraBlok w/ Rod Risers and 2.0" Dura Copper Clamp 50 lbs. 12.03" (305mm) 6" (152mm) 4.80" (122mm) 3.03 lbs (1.37kg)
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QZC-DBM-05 DuraBlok w/ Rod Risers and 0.5" Malleable Iron Clamp 50 lbs. 11.36" (288mm) 6" (152mm) 4.80" (122mm) 2.78 lbs (1.26kg)
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QZC-DBM-75 DuraBlok w/ Rod Risers and 0.75" Malleable Iron Clamp 50 lbs. 11.56" (293mm) 6" (152mm) 4.80" (122mm) 2.84 lbs (1.29kg)
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QZC-DBM-10 DuraBlok w/ Rod Risers and 1.0" Malleable Iron Clamp 50 lbs. 11.64" (296mm) 6" (152mm) 4.80" (122mm) 2.86 lbs (1.30kg)
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QZC-DBM-125 DuraBlok w/ Rod Risers and 1.25" Malleable Iron Clamp 50 lbs. 11.75" (298mm) 6" (152mm) 4.80" (122mm) 2.93 lbs (1.33kg)
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QZC-DBM-150 DuraBlok w/ Rod Risers and 1.5" Malleable Iron Clamp 50 lbs. 11.92" (303mm) 6" (152mm) 4.80" (122mm) 2.99 lbs (1.36kg)
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QZC-DBM-20 DuraBlok w/ Rod Risers and 2.0" Malleable Iron Clamp 50 lbs. 12.16" (309mm) 6" (152mm) 4.80" (122mm) 3.10 lbs (1.41kg)
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PART # DESCRIPTION LOAD CAPACITY HEIGHT WIDTH LENGTH WEIGHT PRICE
DBR Series
QZC-DBR10-12 DuraBlok w/ Rod Risers and 3.5" Pipe Roller 200 lbs. up to 12" (305mm) 6" (152mm) 9.6" (244mm) 6.46 lbs (2.93kg)
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QZC-DBR2-305 DuraBlok w/ 1" High Channel and 3.5" Pipe Roller 500 lbs. 7.09" (180mm) 6" (152mm) 9.6" (244mm) 5.28 lbs (2.39kg)
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QZC-DBR4-6 DuraBlok w/ 1" High Channel and 6" Pipe Roller 500 lbs. 7.09" (180mm) 6" (152mm) 9.6" (244mm) 10.63 lbs (4.82kg)
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QZC-DBR8-10 DuraBlok w/ 1" High Channel and 10" Pipe Roller 1000 lbs. 8.34" (212mm) 6" (152mm) 20.2" (513mm) 15.99 lbs (7.25kg)
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QZC-DBR12-14 DuraBlok w/ 1" High Channel and 14" Pipe Roller 1000 lbs. 9.38" (238mm) 6" (152mm) 20.2" (513mm) 21.34 lbs (9.68kg)
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QZC-DBR16-20 DuraBlok w/ 1" High Channel and 20" Pipe Roller 1000 lbs. 9.78" (248mm) 6" (152mm) 20.2" (513mm) 26.70 lbs (12.11kg)
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Accessories
QZC-CLDP10 Dura-Blok Load Distribution Plate with Slots DBE & DBR Series 500 lbs. 11 Ga. (3.05mm) 1.625" (41mm) 9.5" (241mm) 0.53 lbs (0.24kg)
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Questions & Answers

Question:

Inspector is asking me if it is ok to cut Dura-blok. I cant find anything to show him proof of being able to cut Dura-blok to the size neccessary

Asked by Anonymous user on 06/8/2017 10:47 AM

Answer:
  • - Hello, the manufacturer does NOT recommend cutting down one to the necessary size. They suggest looking for the appropriate size that you might need for your job.

    Anonymous user on 06/23/2017 1:06 PM
Question:

Can the Durablock be glued down to a roof surface?

Asked by Anonymous user on 09/13/2017 2:26 PM

Answer:
  • - Unfortunately, these Durablock Support Solutions cannot be glued to a roof surface.

    andrew b. on 09/13/2017 4:53 PM

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