Question 1

Do you need to pour concrete footings for underneath the jack?

Accepted Answer

Not necessarily, BUT these jacks must have a firm foundation or they may press into soft soil and loosen over time. Usually, crawl spaces under structures are damp - assuming your area of the country is not rock or hard ground. You can use precast concrete piers which can be bought at most building material stores or you can used crushed stone with a concrete block cap leveled in a bed of the stones. If you use stone and a concrete block, make sure you dig a bowl-like place to hold the stone and that it is big enough to have about 4 to 6 inches of stone bigger than the concrete pier or block. Level the piers or blocks before putting weight on them. These jacks are not designed to replace permanent house piers but to stiffen floors or help level settled floor joists.  I used about 10 jacks to support 4 x 6 treated beams to lift and stiffen an existing floor.  The short answer is no, the jacks don't have to have poured footings, but they do have to have footings that can spread the weight evenly. They should not be placed on the ground without some sort of footing. I have used them both ways - with poured footings for the heaviest loads and gravel-block footings for lighter weight areas. Hope this helps.

Question 2

how much will this lift ?

Accepted Answer

Well, the supplied rod used to turn the jack will bend.  I bought some grade 8 bolts to replace them and used a cheater pipe and bent the bolts too.  I don't know how much the house weighed, but the jack didn't fail.  The ability to turn the screw limited how much I could lift.  Also the lift height of 12-16 inches means the threaded shaft is only 4 or so  inches long, so use caution not to screw it all the way out with a load on it.

Question 3

Is there a locking feature on this jack to prevent it from creeping out of adjustment?

Accepted Answer

No.  Stay away from the end of the lift stroke also.  the adjustment bar is cheap and will bend.  Otherwise this does the job and has not moved once I adjusted.

Question 4

Is this product available in other lengths?

Accepted Answer

No

ASIN	B0052PLEOY
Automotive Fit Type	Universal Fit
Best Sellers Rank	#120,201 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #180 in Industrial Floor Jacks
Brand Name	Vestil
Color	Red
Compatible with Vehicle Type	Floor
Customer Reviews	4.6 4.6 out of 5 stars (823)
Item Dimensions	6 x 3.5 x 12 inches
Item Type Name	Jack, Turning Bar
Item Weight	7 pounds
Load Capacity	9738 pounds
Manufacturer	Vestil Manufacturing Corp
Manufacturer Part Number	FJB-16
Manufacturer Warranty Description	Limited 90 Day
Material Type	Welded Steel
Maximum Lifting Height	16 inches
Minimum Height	12 inches
Model Number	FJB-16
Number of Items	2
Number of Packs	1
OEM Equivalent Part Number	FJB-16
Style Name	Telescopic
UPC	745682072630
Unit Count	1 Count

FJB-16

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