4 9 out of 5 stars 111.
Ratchet style roof jack.
While ratchet type jack stands are safe enough pin type stands are almost indestructible since the locking pin makes it impossible for the supporting bar to slip through the base.
This ratchet jack can adjust from 20 7 16 to 29 7 8 and has grease zerks and a 1 clevis pin.
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This is a heavy duty ratchet jack with 1 1 4 acme threads.
5 0 out of 5 stars 1.
Peerless ratchet style folding handle load binder with 2 grab hooks 7 100 lbs.
I just placed a 2x4 on top so the metal body dug into the wood.
Those types of jacks have been around for a long time.
This type of jack stand is the preferred stand for heavy vehicles because it is the strongest and most reliable stand to use in this application.
Roof jacks provide a stable surface to work increasing safety and making it easier to apply roofing.
I never had a problem.
Ideally locate a rafter below the sheathing.
You can usually feel sheathing nails which are driven into rafters through the underlayment attach a jack by driving two 16d nails never roofing nails into a rafter.
Safe working load for 5 16 grade 70 3 8 grade 70 or 3 8 grade 80 chain pack of 4 by peerless.
Vestil trailer stabilizing jack ratchet beam 40 000 lb.
Double lead acme thread drive screw is designed so the jack raises quickly and the crank handle turns easily.
The standard scissors jack provides a sandwich construction bearing design to assist in screw operation.
Lifting capacity 39 1 2in.
Tooth gear design of the scissor arms ensures straight line vertical extension and retraction.
Esco screw style jack stand 20 ton capacity model 10803 not yet rated only 299.
I trust them more than the ratchet style because they are made from extruded steel and not cast steel.
Myers tire supply phoenix 6 ton ratchet style jack stand pair.