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Basement Floor Jack

Basement Floor Jack

Answering the Mail Q. Our old house has beautiful wood floors on the first floor that we want to leave uncovered. The trouble is that without carpet the floors feel cold. There is a full basement underneath with an unfinished ceiling (joists and pipes exposed). To keep the floor warm we are thinking of doing one of the following: 1. Insulating the ceiling in the basement. 2. Taking the insulation off the steam pipes in the basement so that the pipes will help heat the basement. 3. Installing extra radiators in the basement. 4. Installing a woodburning stove. Which idea do you think will be most practical or effective? -R.M., Westfield, N.J.
basement floor jack 1

Basement Floor Jack

Product Overview The Tiger Brand Jack Post Super “S” 8 ft. 4 in. Jack Post can adjust from 4 ft. 8 in. to 8 ft. 4 in. It has a compression load range of 18,000 lbs. at its lowest setting and 9,100 lbs. at its highest setting. It is ideal for correcting sagging floors and basement beams and providing secondary support for room additions, remodeling projects, porches and decks. Strong galvanized plates 4 ft. 8 in. – 8 ft. 4 in. adjustment range Corrects sagging floors, supports basement beams, takes weight off large furniture or appliances Compression load range – 18,000 lbs. – 9,100 lbs. Double carriage bolts and nuts Flush adjusting steel nut with self-centering pilot into the tube Positive locating holes Adjusts easily with a 3/4 in. open-end or adjustable wrench Parts are separate, ready to be assembled Info & Guides Installation Guide You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.
basement floor jack 2

Basement Floor Jack

The Tiger Brand Jack Post Super “S” 8 ft. 4 in. Jack Post can adjust from 4 ft. 8 in. to 8 ft. 4 in. It has a compression load range of 18,000 lbs. at its lowest setting and 9,100 lbs. at its highest setting. It is ideal for correcting sagging floors and basement beams and providing secondary support for room additions, remodeling projects, porches and decks. Strong galvanized plates 4 ft. 8 in. – 8 ft. 4 in. adjustment range Corrects sagging floors, supports basement beams, takes weight off large furniture or appliances Compression load range – 18,000 lbs. – 9,100 lbs. Double carriage bolts and nuts Flush adjusting steel nut with self-centering pilot into the tube Positive locating holes Adjusts easily with a 3/4 in. open-end or adjustable wrench Parts are separate, ready to be assembled Info & Guides Installation Guide You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.
basement floor jack 3

Basement Floor Jack

The Tiger Brand Jack Post Super “S” 8 ft. 4 in. Jack Post can adjust from 4 ft. 8 in. to 8 ft. 4 in. It has a compression load range of 18,000 lbs. at its lowest setting and 9,100 lbs. at its highest setting. It is ideal for correcting sagging floors and basement beams and providing secondary support for room additions, remodeling projects, porches and decks. Strong galvanized plates 4 ft. 8 in. – 8 ft. 4 in. adjustment range Corrects sagging floors, supports basement beams, takes weight off large furniture or appliances Compression load range – 18,000 lbs. – 9,100 lbs. Double carriage bolts and nuts Flush adjusting steel nut with self-centering pilot into the tube Positive locating holes Adjusts easily with a 3/4 in. open-end or adjustable wrench Parts are separate, ready to be assembled
basement floor jack 4

Basement Floor Jack

A. If you are not going to use your basement for anything other than casual storage, I would go with idea No. 1. If the basement is finished and is used as living or working quarters, or if you plan to finish it in the near future and use it for other purposes, then I would go with idea No. 3 – if the present boiler has enough capacity to carry the additional load. Idea No. 2 -taking the insulation off the pipes in the basement – would help keep the basement warmer, and thus the floor above it, but there is the possibility that it might adversely affect the efficiency of the heating system in the rest of the house by allowing the steam to cool off too much before it got upstairs. ——————————————————————— Questions about home repair problems should be addressed to Bernard Gladstone, The New York Times, 229 West 43d Street, New York, N.Y. 10036. Questions of general interest will be answered in this column; unpublished letters cannot be answered individually.
basement floor jack 5

Basement Floor Jack

Fortunately, in most cases corrective steps can be taken by the doit-yourselfer who tackles the job before things have gone too far. He can install telescoping jack posts in the basement and use these to ”jack up” and then support the sagging floor joists. These adjustable steel columns have powerful, screw-type jacks on their upper end, so that after they are in place they can be gradually raised to apply pressure under the sagging beams.
basement floor jack 6

Basement Floor Jack

The Tiger Brand Jack Post Super “S” 8 ft. 4 in. Jack Post can adjust from 4 ft. 8 in. to 8 ft. 4 in. It has a compression load range of 18,000 lbs. at its lowest setting and 9,100 lbs. at its highest setting. It is ideal for correcting sagging floors and basement beams and providing secondary support for room additions, remodeling projects, porches and decks.
basement floor jack 7

Basement Floor Jack

Next, use the handle supplied to turn the screw jack up until the top plate just makes contact with the overhead beam, then use a carpenter’s level to make sure the post is plumb (vertical). Now give the handle one extra half-turn to start applying pressure, then stop and wait about three days before coming back to give the handle another quarter-turn.
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However, if the floor shows signs of cracking, or if there is doubt about whether it can take the strain, then an extra concrete footing should be put in to serve as a base. This calls for chopping a hole in the existing floor about 24 inches square, then digging down to a depth of at least 12 inches. The hole is then filled with freshly poured concrete, which is troweled off flush with the surface of the existing floor, or slightly higher.
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While some floors can be corrected with a single post placed under the low spot, most sagging floors will require two posts with a heavy piece of timber across the two, as shown in the accompanying drawing. This will permit raising or bracing a whole section of the floor, rather than just a single joist.
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Repeat this over a period of weeks, giving the handle a quarterturn every three or four days, until the floor beams are raised to the desired level position. It is important not to try to speed this process since the floors must be raised very slowly to permit things to settle each time, thus avoiding damage to walls or other structural members. Raising the posts too fast could not only cause walls to crack, but also, in extreme cases, cause leaks to develop in plumbing lines.

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