Tel-O-Post Adjustable Floor Jack Post 15 Gauge - Size Range 1'-1'3"
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Questions & Answers
More details are available under the "Features and Details" section, but it has a price range between 11k and It depends on the extension whether the weight is 18k lbs or not.
A plate with dimensions of about ( 4 x 4 ) was used to support a wood beam ( 4 x 6 ) in a basement. Hopefully this will be of help.
There is a metal tube in the bottom of the jack that measures about 2 1/2 to 3 inches in diameter. One inch is the diameter of the steel rod. appears to be the same style as the ones sold at Home Depot.