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Negative Blocking Rigging Kits

When you are rigging down heavy wood, you need dependable rigging gear. WesSpur's Negative Blocking kits give you a discount on the best gear from manufacturers we trust. We don't use off-brand or cheap products - we bundle the best gear together so we can add savings for you.

Negative Blocking is what we call any rigging system where your block is below the load. (We illustrated an article on Negative Blocking in our catalog - you can check it out online here.) This type of rigging puts tremendous forces on your gear - you want gear you can depend on!

Our rigging kits contain rigging rope with rope bag, arborist block and sling, and basal friction device with sling. We have selected gear that will work well together, to save you time shopping. Our rigging kits are fully customizable! Contact us to switch out any item in your kit - you'll keep the kit savings and get exactly the gear you want!

Free Samson Rigging Wheel with select Rigging Kits! No Coupon required. Limited time only, while supplies last.

Negative Blocking Rigging Kit #1 - Standard Trees

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WesSpur's original negative blocking kit. Everything you need to set up a negative block rigging system with a Working Load Limit of 1,000 lb. Using this gear you will save wear and tear on your ropes and have better control of your rigging. We built this kit with great gear from top U.S. manufacturers. Everything in your kit will work together reliably within the rated limits. Check out our other kits if you need a system to handle heavier loads!

Our rigging kits are fully customizable! Contact us to switch out any item in your kit - you'll keep the kit savings and get exactly the gear you want!

System MBS: 10,000 lb • 10:1 WLL 1,000 lb

    Kit Contents:
  • 150' Stable Braid 1/2" (SB1215)
  • Small Nickle-plated Port-a-Wrap III (RIG113)
  • 1/2" x 15' Tenex Sling (SLI203)
  • 5/8" Loopie Sling (SLI403)
  • CMI 3/4" Steel Block (PUL306)
  • Large Rope Bag (BAG103)

For a limited time, get a free Samson Rigging Wheel when you purchase this kit. No coupon needed, valid while supplies last.

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Negative Blocking Rigging Kit #2 - Bigger Trees

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A step up in size and strength. This kit provides the gear you need to set up a negative block rigging system with a Working Load Limit of 1,500 lb. Using this gear you will save wear and tear on your ropes and have better control of your rigging. We built this kit with great gear from top U.S. manufacturers. Everything in your kit will work together reliably within the rated limits. Check out our other kits if you need a system to handle heavier loads!

Our rigging kits are fully customizable! Contact us to switch out any item in your kit - you'll keep the kit savings and get exactly the gear you want!

System MBS: 15,000 lb • 10:1 WLL 1,500 lb

    Kit Contents:
  • 150' Stable Braid 5/8" (SB5815)
  • Large Nickle-plated Port-a-Wrap III (RIG114)
  • 5/8" x 18' Tenex Sling (SLI207)
  • 3/4" Loopie Sling (SLI404)
  • CMI 3/4" Stainless Steel Block (PUL302)
  • Large Rope Bag (103)

For a limited time, get a free Samson Rigging Wheel when you purchase this kit. No coupon needed, valid while supplies last.

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Negative Blocking Kit #3 - Tall Trees

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We built this for our customers who are working with big conifers, cottonwoods, and other tall trees. You get a bigger diameter rope and sling, and 250' of rope (instead of 150') to deal with those monster trees. This kit provides the gear you need to set up a negative block rigging system with a Working Load Limit of 1,500 lb. Using this gear you will save wear and tear on your ropes and have better control of your rigging. We built this kit with great gear from top U.S. manufacturers. Everything in your kit will work together reliably within the rated limits. Check out our other kits if you need a system to handle heavier loads!

Our rigging kits are fully customizable! Contact us to switch out any item in your kit - you'll keep the kit savings and get exactly the gear you want!

System MBS: 15,000 lb • 10:1 WLL 1,500 lb

    Kit Contents:
  • 250' Stable Braid 5/8" (SB58)
  • Large Nickle-plated Port-a-Wrap III (RIG114)
  • 3/4" x 25' Tenex Sling (SLI221)
  • 3/4" Loopie Sling (SLI404)
  • CMI 3/4" Stainless Steel Block (PUL302)
  • XL Rope Bag (BAG111)

For a limited time, get a free Samson Rigging Wheel when you purchase this kit. No coupon needed, valid while supplies last.

Review this item

Nystron Rigging Kit #1

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The Nystron Rigging Kit contains everything you need to set up a negative block rigging system with added energy absorption.

Nystron is a double-braid rigging line with nylon core fibers, which makes it stronger and more elastic than all-polyester rigging lines. This translates to more energy absorption in your rigging system. Nystron is ideal for rigging scenarios where there is less room to let the rope run. The extra stretch in the rope helps mitigate some of the shock generated in negative blocking. An excellent choice for managing your large removal jobs.

    Kit Contents:
  • 200' Nystron 1/2” (NS12)
  • Stein RC-2000 Lowering Device (RIG118)
  • 3/4” x 25' Tenex Tec Sling (SLI221)
  • ISC Small 5/8" Spring Block (PUL213)
  • 3/4” x 18' Tenex Tec Sling (SLI210)
  • XL WesSpur Rope Bag (BAG111)

For a limited time, get a free Samson Rigging Wheel when you purchase this kit. No coupon needed, valid while supplies last.

Review this item

Nystron Rigging Kit #2

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The Nystron Rigging Kit contains everything you need to set up a negative block rigging system with added energy absorption using a larger-diameter rope and the Stein RCW-3001 for serious jobs.

Nystron is a double-braid rigging line with nylon core fibers, which makes it stronger and more elastic than all-polyester rigging lines. This translates to more energy absorption in your rigging system. Nystron is ideal for rigging scenarios where there is less room to let the rope run. The extra stretch in the rope helps mitigate some of the shock generated in negative blocking. An excellent choice for managing your large removal jobs.

Kit Contents:

  • 250' Nystron 5/8” (NS58)
  • Stein RC-3001 Lowering Device (RIG119)
  • ISC Large 3/4" Spring Block (PUL304)
  • 1” x 20' Tenex Tec Sling (SLI214)
  • XL WesSpur Rope Bag (BAG111)

Note: we recommend a heavy-duty plastic tote or similar case for transport of the RC-3001 unit. A textile bag will likely not stand up to it's weight and hard edges/protrusions.

For a limited time, get a free Samson Rigging Wheel when you purchase this kit. No coupon needed, valid while supplies last.

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Atlas Rigging Kit

KIT61

Everything you need to set up a negative block rigging system with Atlas 9/16" rigging line from Sterling Rope. The Nylon core in Atlas gives good energy-absorption for jobs where there is less room to let the rope run. 220' of of rigging line is ample for rigging trees up to 90'. This is an excellent go-to rigging kit.

    Kit Contents:
  • 220' Atlas 9/16" (AT9122)
  • Large Nickle-plated Port-a-Wrap III (RIG114)
  • 5/8" x 18' Tenex TEC Eye Sling (SLI207)
  • 5/8" x 2-6' Loopie Sling (SLI403)
  • ISC 5/8" Aluminum Spring Block (PUL217)
  • WesSpur XL Rope Bag (BAG111)

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Big Rig Kit

KIT39

This is our biggest negative block rigging kit to date! The XL Port-a-Wrap has a 3.5” bollard for a good bend-radius on up to 3/4” rigging line. The base sling is long enough to hang on stems up to 6' round. The large ISC spring block for running the 3/4" Stable Braid. This kit is built for you to tackle large-diameter trunk wood with confidence.

    Kit contents:
  • 200' Stable Braid 3/4" (SB3420)
  • XL Nickle-plated Port-a-Wrap III (RIG142)
  • 1" x 25' Double-braid Sling (SLI121)
  • 3/4" Loopie Sling (SLI404)
  • ISC Large 3/4" Aluminum Spring Block (PUL304)
  • XL Rope Bag (BAG111)

For a limited time, get a free Samson Rigging Wheel when you purchase this kit. No coupon needed, valid while supplies last.

Review this item

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