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

Support Bases
Part #DescriptionLoad CapacityHeightWidthLengthWeightPrice
QZC-DBMDuraBlok Rooftop Support Base500 lbs4" (101mm)6" (152mm)4.8" (122mm)4.48 lbs (2.03kg)
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QZC-DBPDuraBlok Rooftop Support Base500 lbs4" (101mm)6" (152mm)9.6" (244mm)2.35 lbs (1.07kg)
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DB Series
Part #DescriptionLoad CapacityHeightWidthLengthWeightPrice
QZC-DB5DuraBlok Base w/ 1" High Channel500 lbs5" (127mm)6" (152mm)4.8" (122mm)2.75 lbs (1.25kg)
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QZC-DB10DuraBlok Base w/ 1" High Channel500 lbs5" (127mm)6" (152mm)9.6" (244mm)5.28 lbs (2.39kg)
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QZC-DB20DuraBlok Base w/ 1" High Channel1,000 lbs5" (127mm)6" (152mm)20.2" (513mm)10.63 lbs (4.82kg)
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QZC-DB30DuraBlok Base w/ 1" High Channel1,500 lbs5" (127mm)6" (152mm)30.8" (782mm)15.99 lbs (7.25kg)
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QZC-DB40DuraBlok Base w/ 1" High Channel2,000 lbs5" (127mm)6" (152mm)41.4" (1052mm)21.34 lbs (9.68kg)
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QZC-DB48DuraBlok Base w/ 1" High Channel2,500 lbs5" (127mm)6" (152mm)52.0" (1321mm)26.70 lbs (12.4kg)
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DB6 Series
Part #DescriptionLoad CapacityHeightWidthLengthWeightPrice
QZC-DB610DuraBlok Base w/ 2.625" High Channel500 lbs.6.625" (167mm)6" (152mm)9.6" (244mm)6.36 lbs (2.88kg)
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QZC-DB620DuraBlok Bases w/ 2.625" High Channel1,000 lbs.6.625" (167mm)6" (152mm)20.2" (513mm)12.90 lbs (5.85kg)
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QZC-DB630DuraBlok Bases w/ 2.625" High Channel1,500 lbs.6.625" (167mm)6" (152mm)30.8" (782mm)19.45 lbs (8.82kg)
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QZC-DB640DuraBlok Bases w/ 2.625" High Channel2,000 lbs.6.625" (167mm)6" (152mm)41.4" (1052mm)26.00 lbs (11.79kg)
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QZC-DB648DuraBlok Bases w/ 2.625" High Channel2,500 lbs.6.625" (167mm)6" (152mm)52.0" (1321mm)32.55 lbs (14.76kg)
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DB10 Series
Part #DescriptionLoad CapacityHeightWidthLengthWeightPrice
QZC-DB10-28DuraBlok Bridge w/ 1.625" High Channel1,000 lbs.5.625" (143mm)9.6" (244mm)28" (711mm)13.16 lbs (5.97kg)
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QZC-DB10-36DuraBlok Bridge w/ 1.625" High Channel1,000 lbs.5.625" (143mm)9.6" (244mm)36" (914mm)14.36 lbs (6.51kg)
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QZC-DB10-42DuraBlok Bridge w/ 1.625" High Channel1,000 lbs.5.625" (143mm)9.6" (244mm)42" (1067mm)15.52 lbs (7.04kg)
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QZC-DB10-50DuraBlok Bridge w/ 1.625" High Channel1,000 lbs.5.625" (143mm)9.6" (244mm)50" (1270mm)16.45 lbs (7.46kg)
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QZC-DB10-60DuraBlok Bridge w/ 1.625" High Channel1,000 lbs.5.625" (143mm)9.6" (244mm)60" (1524mm)17.94 lbs (8.14kg)
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DBE Series
Part #DescriptionLoad CapacityHeightWidthLengthWeightPrice
QZC-DBE10-8DuraBlok w/ Rod Risers and 1" Channel200 lbs.5.5" - 8" (140 - 203mm)6" (152mm)9.35" (161mm)5.68 lbs (2.58kg)
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QZC-DBE10-12DuraBlok w/ Rod Risers and 1" Channel200 lbs.5.5" - 12" (140 - 305mm)6" (152mm)9.35" (161mm)5.72 lbs (2.59kg)
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QZC-DBE10-16DuraBlok w/ Rod Risers and 1" Channel200 lbs.5.5" - 16" (140 - 406mm)6" (152mm)9.35" (161mm)5.76 lbs (2.61kg)
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DB_DS Series
Part #DescriptionLoad CapacityHeight (Overall)Width (Overall)LengthWeightPrice
QZC-DB2318DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.23" (584mm)25.625" (651mm)20.2" (513mm)33.31 lbs (15.11kg)
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QZC-DB2918DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.29" (736mm)25.625" (651mm)20.2" (513mm)35.00 lbs (15.88kg)
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QZC-DB4118DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.41" (1041mm)25.625" (651mm)20.2" (513mm)38.40 lbs (17.42kg)
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QZC-DB5318DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.53" (1346mm)25.625" (651mm)20.2" (513mm)41.80 lbs (18.96kg)
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QZC-DB2324DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.23" (584mm)31.625" (803mm)20.2" (513mm)34.15 lbs (15.49kg)
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QZC-DB2924DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.29" (736mm)31.625" (803mm)20.2" (513mm)35.84 lbs (16.26kg)
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QZC-DB4124DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.41" (1041mm)31.625" (803mm)20.2" (513mm)39.25 lbs (17.80kg)
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QZC-DB5324DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.53" (1346mm)31.625" (803mm)20.2" (513mm)42.65 lbs (19.34kg)
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QZC-DB2336DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.23" (584mm)43.625" (1108mm)20.2" (513mm)35.84 lbs (16.26kg)
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QZC-DB2936DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.29" (736mm)43.625" (1108mm)20.2" (513mm)37.55 lbs (17.03kg)
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QZC-DB4136DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.41" (1041mm)43.625" (1108mm)20.2" (513mm)40.95 lbs (18.57kg)
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QZC-DB5336DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.53" (1346mm)43.625" (1108mm)20.2" (513mm)44.34 lbs (20.11kg)
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QZC-DB2348DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.23" (584mm)55.625" (1415mm)20.2" (513mm)37.55 lbs (17.03kg)
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QZC-DB2948DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.29" (736mm)55.625" (1415mm)20.2" (513mm)39.25 lbs (17.80kg)
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QZC-DB4148DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.41" (1041mm)55.625" (1415mm)20.2" (513mm)42.65 lbs (19.34kg)
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QZC-DB5348DSDuraBlok w/ 1.625" Vertical and Horizontal Channels1,000 lbs.53" (1346mm)55.625" (1415mm)20.2" (513mm)46.03 lbs (20.88kg)
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DBM Series
Part #DescriptionLoad CapacityMax. HeightWidthLengthWeightPrice
QZC-DBM-05CTDuraBlok w/Rod Risers and 0.5" Dura Copper Clamp50 lbs.11.19" (284mm)6" (152mm)4.80" (122mm)2.75 lbs (1.25kg)
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QZC-DBM-75CTDuraBlok w/ Rod Risers and 0.75" Dura Copper Clamp50 lbs.11.34" (288mm)6" (152mm)4.80" (122mm)2.76 lbs (1.25kg)
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QZC-DBM-10CTDuraBlok w/ Rod Risers and 1.0" Dura Copper Clamp50 lbs.11.45" (291mm)6" (152mm)4.80" (122mm)2.84 lbs (1.29kg)
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QZC-DBM-125CTDuraBlok w/ Rod Risers and 1.25" Dura Copper Clamp50 lbs.11.63" (295mm)6" (152mm)4.80" (122mm)2.95 lbs (1.34kg)
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QZC-DBM-150CTDuraBlok w/ Rod Risers and 1.5" Dura Copper Clamp50 lbs.11.78" (299mm)6" (152mm)4.80" (122mm)2.96 lbs (1.34kg)
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QZC-DBM-20CTDuraBlok w/ Rod Risers and 2.0" Dura Copper Clamp50 lbs.12.03" (305mm)6" (152mm)4.80" (122mm)3.03 lbs (1.37kg)
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QZC-DBM-05DuraBlok w/ Rod Risers and 0.5" Malleable Iron Clamp50 lbs.11.36" (288mm)6" (152mm)4.80" (122mm)2.78 lbs (1.26kg)
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QZC-DBM-75DuraBlok w/ Rod Risers and 0.75" Malleable Iron Clamp50 lbs.11.56" (293mm)6" (152mm)4.80" (122mm)2.84 lbs (1.29kg)
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QZC-DBM-10DuraBlok w/ Rod Risers and 1.0" Malleable Iron Clamp50 lbs.11.64" (296mm)6" (152mm)4.80" (122mm)2.86 lbs (1.30kg)
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QZC-DBM-125DuraBlok w/ Rod Risers and 1.25" Malleable Iron Clamp50 lbs.11.75" (298mm)6" (152mm)4.80" (122mm)2.93 lbs (1.33kg)
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QZC-DBM-150DuraBlok w/ Rod Risers and 1.5" Malleable Iron Clamp50 lbs.11.92" (303mm)6" (152mm)4.80" (122mm)2.99 lbs (1.36kg)
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QZC-DBM-20DuraBlok w/ Rod Risers and 2.0" Malleable Iron Clamp50 lbs.12.16" (309mm)6" (152mm)4.80" (122mm)3.10 lbs (1.41kg)
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DBR Series
Part #DescriptionLoad CapacityHeightWidthLengthWeightPrice
QZC-DBR10-12DuraBlok w/ Rod Risers and 3.5" Pipe Roller200 lbs.up to 12" (305mm)6" (152mm)9.6" (244mm)6.46 lbs (2.93kg)
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QZC-DBR2-305DuraBlok w/ 1" High Channel and 3.5" Pipe Roller500 lbs.7.09" (180mm)6" (152mm)9.6" (244mm)5.28 lbs (2.39kg)
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QZC-DBR4-6DuraBlok w/ 1" High Channel and 6" Pipe Roller500 lbs.7.09" (180mm)6" (152mm)9.6" (244mm)10.63 lbs (4.82kg)
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QZC-DBR8-10DuraBlok w/ 1" High Channel and 10" Pipe Roller1000 lbs.8.34" (212mm)6" (152mm)20.2" (513mm)15.99 lbs (7.25kg)
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QZC-DBR12-14DuraBlok w/ 1" High Channel and 14" Pipe Roller1000 lbs.9.38" (238mm)6" (152mm)20.2" (513mm)21.34 lbs (9.68kg)
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QZC-DBR16-20DuraBlok w/ 1" High Channel and 20" Pipe Roller1000 lbs.9.78" (248mm)6" (152mm)20.2" (513mm)26.70 lbs (12.11kg)
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Accessories
Part #DescriptionLoad CapacityHeightWidthLengthWeightPrice
QZC-CLDP10Dura-Blok Load Distribution Plate with SlotsDBE & DBR Series 500 lbs.11 Ga. (3.05mm)1.625" (41mm)9.5" (241mm)0.53 lbs (0.24kg)
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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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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 10.47 AM Thursday, 08 June, 2017

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 01.06 PM Friday, 23 June, 2017
Question:

Can the Durablock be glued down to a roof surface?

Asked by Anonymous user on 02.26 PM Wednesday, 13 September, 2017

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

    andrew b. on 04.53 PM Wednesday, 13 September, 2017

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