Shop Now, Enjoy Free USA Shipping! No Minimum Order Required — Quality Solutions Delivered.

Dual-Thread Adjustable House Jacks for Leveling, 12″–22″ & 17″–31″ Height Range, 10,000 lbs Heavy-Duty Steel Screw Jack Support Posts for Crawl Spaces & Floor Joists, 4 Pack

Price range: $95.99 through $109.99

Enjoy Tax-free shopping with free shipping on all U.S. orders!

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Description

The Dual-Thread Adjustable House Jack series offers reliable structural support with a 10,000 lbs load capacity. Featuring an opposing dual-thread mechanism for smooth, micro-precise height extension, these carbon-steel screw jacks are available in 12–22 inch and 17–31 inch height options for crawl spaces, floor joists, and beams.

Key Features & Technical Highlights

  • 10,000 LBS HEAVY-DUTY LOAD CAPACITY: Crafted from high-strength carbon steel, each screw jack safely transfers up to 10,000 lbs of vertical weight to prepared concrete footings.
  • PRECISION DUAL-THREADED ADJUSTMENT: Opposing threads extend or retract simultaneously as you turn the central adjustment bar, allowing gradual, effortless height fine-tuning under load.
  • VERSATILE HEIGHT OPTIONS (12″–22″ & 17″–31″): Choose between low-profile crawl space coverage (12–22″) and standard subfloor/attic spans (17–31″) to suit your exact clearance needs.
  • SOLID STEEL BODY & SUPPORT PLATES: Features heavy-gauge upper and lower support plates designed to make full, even contact with structural beams and footings.
  • CRAWL SPACE & FLOOR JOIST SUPPORT: Engineered for supplemental leveling during sagging floor repair, subfloor maintenance, and home renovations.

Need Higher Clearance for Basements or Decks?

If your installation space requires more vertical reach than 31 inches, explore our extended-reach alternative:

Why Choose Dual-Thread Screw Jacks?

Restoring stability to uneven floors and sagging beams requires precision engineering. Traditional single-thread jacks can be difficult to turn when bearing structural weight. Our **Dual-Thread Adjustable House Jacks** utilize counter-opposing threads to double the adjustment speed and significantly reduce torque resistance during installation. For more details on choosing the right mechanical system, read our guide on how dual-thread screw jacks improve crawl space leveling.

How to Select Your Size Variant

  • 12″–22″ Height Range: Perfect for tight, low-profile crawl spaces beneath floor joists.
  • 17″–31″ Height Range (Available in Multi-Packs): Ideal for standard crawl spaces, attics, and subfloor beam reinforcement.

Technical Specifications

Choose between two specialized height adjustment series based on your required vertical clearance and installation space:

Technical Feature 12″ – 22″ Low-to-Mid Series 17″ – 31″ Extended Reach Series
Adjustable Height Range 12″ to 22″ (30.5 cm – 55.8 cm) 17″ to 31″ (43.2 cm – 78.7 cm)
Rated Load Capacity 10,000 lbs (4,535 kg) / unit 10,000 lbs (4,535 kg) / unit
Adjustment Mechanism Opposing Dual-Threaded Steel Screw Opposing Dual-Threaded Steel Screw
Material & Finish Heavy-Duty Carbon Steel with Anti-Rust Coating Heavy-Duty Carbon Steel with Anti-Rust Coating
Primary Applications Tight Crawl Spaces, Low Floor Joists & Beams Attics, Standard Basements & Higher Clearances
Available Configurations 4 Pack Bulk Set 4 Pack Bulk Set

Installation & Safety Guidelines

  1. Measure Clearance: Measure the exact distance between your prepared footing and structural beam.
  2. Ensure Solid Footing: Always place the jack upright on a firm, level, load-bearing concrete footing.
  3. Position & Adjust: Center the base and top plates. Rotate the dual-thread center sleeve to raise the post until it makes full contact with the beam.
  4. Fine-Tune & Verify: Micro-adjust until snug and verify that the post is completely vertical (plumb) before bearing full structural load.

Note: These jacks are designed for temporary or supplemental support. Consult a qualified professional for permanent structural lifting.

Additional information

Weight N/A
Dimensions N/A
Pack Size

12"–22"(4 Pack), 17"–31"(4Pack)

1 review for Dual-Thread Adjustable House Jacks for Leveling, 12″–22″ & 17″–31″ Height Range, 10,000 lbs Heavy-Duty Steel Screw Jack Support Posts for Crawl Spaces & Floor Joists, 4 Pack

  1. Jon Body –

    Solid jack for tight spaces

    Used this under a low corner of my deck stairs. The compact size fit the limited clearance well, and the threads turned smoothly for small height adjustments. It feels sturdy, and being able to readjust it later is a useful feature.

Add a review

SIGN UP AND GET 5% OFF

Sign up for an instant discount, plus early access, new products and more