Jack Post 15 ga. Adjustable 56"–100"

Engineered for both professional contractors and DIY enthusiasts, this 15-gauge adjustable jack post delivers heavy-duty support wherever it’s needed. Constructed from premium high-carbon steel and finished with a corrosion-resistant coating, it adjusts easily from 56" up to 100" to stabilize sagging floors, reinforce basement beams, shore up stairwells or decks, and serve as reliable secondary support in crawl spaces and attics.

Simple to install and quick to adjust with a standard ¾" wrench, the JS100 jack post features deep-dish, self-centering plates and a double-locked collar secured by a zinc-coated carriage bolt and nut—ensuring maximum safety and consistent load distribution under high stress.

Key Features

• Durable 15-gauge high-carbon steel construction
• Adjustable design extends from 56" (4 ft. 8 in.) to 100" (8 ft. 4 in.)
• Up to 18,000 lbs load capacity for heavy structural support
• Double-locked collar with zinc-coated carriage bolt & nut for added safety
• Deep-dish self-centering plates ensure secure contact on uneven surfaces
• Corrosion-resistant inside and out for long-term durability
• Quick adjustment with a ¾" wrench—no special tools required
• Can be used as permanent secondary support
• Made in the USA