Turtle Plastics Cribbing Block – Interlocking Composite, 8 to 58 Tonne

Interlocking composite cribbing that stacks into a tower and holds a load once the jack has lifted it. Recycled plastic, not timber – it will not rot, splinter, soak up oil or water, it is non conductive, and it does not crush down after a season in the back of a truck. Four sizes from an 8 tonne standard crib up to a 58 tonne prime crib. Pick the capacity you need below.

Ways to buy

• Standard Crib (T-2/4-18C) – 2" x 4" x 18", 8,164 kg. The light one you carry in one hand.
• Hybrid Crib (T-44PL-18) – 4" x 4" x 18", 20,500 kg. The general purpose recovery block.
• Super Crib (T-67SC-24) – 6" x 7" x 24", 49,900 kg.
• Prime Crib (T-67PC-24) – same 6" x 7" x 24" footprint, 58,800 kg. The heaviest duty block in the range.
• Building a tower? – work out how many you need for the lift height, then add two. Nobody ever wished they had fewer cribs on site.
• Slabs, lock blocks, wedges, step chocks and pads – separate listings, linked at the bottom of this page.

Pick your cribbing block

What is in the box

• One block in the size you select.
• Moulded rope handle where the factory fits one.
• Capacity is a static, flat, evenly distributed rating on a firm base.
• Recycled composite plastic – will not rot, splinter, absorb oil or water, and is non conductive.

Specifications

How to choose

• Work from the load, not the jack. Size the crib for the weight that will sit on it, then check the tower is square and under about three times its base width in height.
• Light vehicle recovery? Standard and Hybrid cribs cover most of it and one person can carry them.
• Trucks, plant, rail? Super or Prime. The Prime is the same footprint as the Super with more capacity, so if you are close to the limit, take the Prime.
• Soft ground, hot bitumen or a trailer deck? Put a crib pad under the bottom block. Linked below.

Technicians Advice

The cylinder lifts. The cribbing holds. That is the whole discipline, and the people who get hurt are the ones who forget the second half of it – a seal can pass, a hose can get knocked, a coupler can be half engaged, and a load held on oil pressure alone comes down. Build the crib as you lift: a little bit of stroke, a little bit of crib, repeat.

A tower built in 50 mm bites is stable and you always have support within a few millimetres of the load. Keep the stack square and keep it under about three times its narrowest base dimension in height – taller than that and it will walk under vibration or a knock. The capacity figures on this page are for a block loaded flat and evenly on a firm base; point-load the corner of a crib and the number means nothing, which is exactly what the pads are for.

On soft ground, on summer bitumen, or on a trailer deck, the jack needs a pad too – a 100 tonne ram sitting on a 100 mm base is putting the weight of ten cars through something the size of a saucer.

Things worth knowing: never mix timber and composite blocks in one stack, because they compress at different rates and the tower works itself loose; and the rope handles are for carrying the block, not for dragging a loaded one out from under something.

Complete your setup

Need help choosing? Call 1300 146 737 or email sales@mhfgc.com.au – real technicians, real answers.