More Information
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Foundation Systems
New Construction Foundations
Pulldown™ Micropiles
Underpinning

CHANCE manufactured anchors are rated up to 100,000 pounds each. These are available in round or square shafts manufactured from high-strength galvanized steel. Special patented brackets are used to stabilize or lift foundations in distress.

CHANCE is the only company with a pre-engineered and manufactured underpinning system evaluated and listed by all the national building code agencies.

A Solid Foundation Solution™

CHANCE manufactured anchors are rated up to 100,000 pounds each. These are available in round or square shafts manufactured from high-strength galvanized steel. Special patented brackets are used to stabilize or lift foundations in distress. CHANCE is the only company with a pre-engineered and manufactured underpinning system evaluated and listed by all the national building code agencies.

HELICAL PIER® Foundation Systems transfers the load to bearing plates that are located in stable soil. This patented system brings an economical solution to underpinning systems. Fast - Predictable - Measurable are just three advantages of this building code evaluated and accepted system.
Now the world's largest manufacturer of anchors and foundations supplies this pre-engineered system to users over the internet.

Residential construction or repair, industrial and commercial applications in limited access areas, environmentally sensitive areas, vibration free construction, loads subject to compression, as well as uplift are easily addressed with the CHANCE system.

Once your CHANCE certified installer has received the plan of repair from a qualified design group or individual, he can proceed with the repair. Remember, one of the best investments you can make is to get a soil boring on your property. This will enable the designer to determine what type of anchor and to what depth it must go to stable soil.

Usually the installer will excavate a hole at each anchor location wide enough and deep enough to place a bracket under the foundation. The leading section of the anchor with the proper number and size of helices will be installed by a rotary installing machine. Extensions are added until the helices are at the proper depth and the predetermined torque is achieved. At that point the bracket is added, the load is transferred to the anchor, and the building can be stabilized or lifted according to the plan of repair.

BOCA ReportBOCA Report
# 94-27 [PDF]
ICBO ReportICBO Report
# EER5110 [PDF]
SBCCI ReportSBCCI Report
# 9504 [PDF]
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Standard-Duty Underpinning Brackets for Helical Pier® Foundation Systems

Patents for system, method and components 5,011,336; 5,120,163; 5,139,368; 5,171,107; 5,213,448 For use with 11/2" and 13/4" square shaft anchors, as specified below, each bracket is identified by the size stamped on the vertical gusset. Brackets also may be used in conjunction with Uplift-Restraint Bracket (see Bulletin 01-9502). Bracket comes complete with the hardware required for assembly of bracket; does not include concrete anchor bolts. The lifting assembly, consisting of the underpinning bracket and jacking tool, is designed to lift with hydraulic jack assist as shown below. However, if jack assist is not available, lifting can be done with the bolts of the bracket. The recommended method is to use a hydraulic jack with a load gauge to avoid exceeding the ratings of the brackets.

Bracket as assembled<br>NOTE: T-pipe cross-member is solid steel bar on Brackets C150-0298 and C150-0299Bracket as assembled.
Note: T-pipe cross-member is solid steel bar on Brackets: C150-0298 and C150-0299.
Standard-Duty Bracket includes these components: C150-0121, C150-0298 or C150-0299Standard-Duty Bracket
includes these components: C150-0121, C150-0298 or C150-0299.
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Ordering Information

Bracket Catalog No.
C150-0121
C150-0298
C150-0299
Anchor Shaft Size
11/2" Square Shaft
11/2" Square Shaft
13/4" Square Shaft
SS Anchor Series
Standard SS5
High Strength SS150
Standard SS5
High Strength SS150
SS175
Minimum Bracket Ultimate Strength
40,000 lb.
40,000 lb.
80,000 lb.
80,000 lb.
80,000 lb.
With 2.0 Safety Factor
20,000 lb.
20,000 lb.
40,000 lb.
40,000 lb.
40,000 lb.
Typical Achievable Installed Capacity*
20,000 lb.*
25,000 lb.*
20,000 lb.*
25,000 lb.*
30,000 lb.*
*The capacity of Chance Helical Pier® Foundation Systems is a function of many individual elements, including the capacity of the foundation, bracket, anchor shaft, helix plate and bearing stratum, as well as the strength of the foundation-to-bracket connection and the quality of anchor installation. The last row of the table shows typical capacities of the Chance Helical Pier® Foundation Systems that are achievable under normal conditions. Achievable capacities could be higher or lower depending on the above factors.

Dimensions affecting size of Hydraulic Jack
  • Clearance between two flat washers - 43/4"
  • Clearance between bolt couplings - 5"
  • Maximum compressed height of jack - 11"
Bracket as applied on foundation footing.Bracket as applied on foundation footing.
Jacking Tool C150-0117 (Hydraulic jack not furnished)Jacking Tool C150-0117 (Hydraulic jack not furnished).
Jacking Tool assembled to BracketJacking Tool assembled to Bracket.
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