Simpson Strong-Tie CB44 4x4 Column Base

The Simpson Strong-Tie CB44 is a heavy-duty 7-gauge steel column base designed for connecting 4x4 wood posts to concrete foundations with increased uplift resistance for wind or seismic loading. Montana contractors dealing with extreme weather conditions and seismic zones need hardware that won’t fail when lateral forces hit. This cast-in-place connector delivers.

Heavy-Duty Construction That Matters

The CB44’s 7-gauge steel construction puts it in a different class than lighter column bases. That gauge thickness translates to genuine structural capacity when uplift forces try to pull posts out of their footings. At 16.69 inches tall with 3.94-inch width and 3.56-inch depth, this base provides substantial bearing area and strap height for load transfer.

The standard G90 Hot-Dip Galvanized finish handles Montana’s freeze-thaw cycles without the rust issues that destroy cheaper hardware. Optional stainless steel or black powder-coat finishes are available for specialized applications, though the G90 coating works for 95% of installations.

Specification	Value
Model Number	CB44
Steel Gauge	7-gauge (straps and base plate)
Height	16.69 inches
Width	3.94 inches
Depth	3.56 inches
Bolt Diameter	5/8 inch
Concrete Cover Required	3 inches minimum side cover

Installation Requirements and Code Compliance

This base is wet-set in concrete only — no retrofit applications. The base plate must be flush with the concrete surface for proper bearing. That means careful placement during the pour, not something added after the fact.

Code compliance includes International Building Code (IBC), International Residential Code (IRC), City of Los Angeles Building Code (LABC), City of Los Angeles Residential Code (LARC), ICC-ES Report ESR-3050, and Florida Building Code (FL10860). The ICC-ES report matters for Montana inspectors who want third-party verification of load values.

The CB44 requires 5/8-inch diameter structural bolts (ASTM A307 Grade A or better), sold separately. Hardware not included catches some buyers off guard, but it allows contractors to match bolt length to their specific post dimensions.

Critical limitation: Do not use for non-top-supported installations like unbraced carports. This base assumes lateral support at the top of the post. Free-standing posts need a different connector design.

Alternative Models for Different Applications

Simpson offers related models that solve specific problems:

CBS44: Standoff version providing a 1-inch gap to prevent wood rot. Smart choice for exterior applications where moisture accumulation at the concrete-wood interface causes premature post failure.

CBSQ44: Uses SDS Heavy-Duty Connector screws instead of bolts for faster installation. The screw-down version saves installation time but check local code acceptance first.

ABU44: Retrofit post base for existing concrete; features a standoff and ZMAX coating. When you’re adding posts to an existing slab, this retrofit base works where the CB44 can’t.

PBS44: Standoff post base with ZMAX coating, often used for new construction. Another moisture-management option with enhanced corrosion protection.

Professional Reviews and Real-World Performance

The CB44 earns 4.7 out of 5 stars from contractors who’ve installed it. Users praise its extremely sturdy 7-gauge steel construction, high uplift resistance for safety, reliable corrosion resistance with G90 finish, and code-compliant design.

The main complaint centers on hardware not being included. The requirement for precise placement in wet concrete also frustrates crews who prefer adjustable bases. But for applications requiring maximum uplift resistance, the cast-in-place design delivers superior performance.

Applications and Use Cases

Primary applications include connecting wood, glulam, or engineered wood columns to concrete foundations; structural columns requiring high load values; residential and light-commercial framing for decks and patio covers; and top-supported installations.

The CB44 shines in Montana applications where wind uplift or seismic forces demand serious holding power. Deck posts subjected to lateral snow loads. Patio cover columns facing chinook winds. Any 4x4 post where failure means structural damage or safety issues.

Simpson Strong-Tie covers defects in materials and workmanship under their limited warranty. Given Simpson’s 70-year track record in the connector business, warranty claims remain rare.

For Montana contractors building to current codes with proper uplift resistance, the CB44 delivers engineered performance that lighter-gauge alternatives can’t match. The 7-gauge steel costs more but prevents callbacks when extreme weather tests the structure.

Frequently Asked Questions

Q: Does the Simpson Strong-Tie CB44 column base come with bolts?

No, the Simpson Strong-Tie CB44 does not include bolts or other hardware — these must be purchased separately. The base requires 5/8-inch diameter structural bolts (ASTM A307 Grade A or better) to attach the 4x4 post to the base.

Q: What’s the difference between the CB44 and CBS44 column bases?

The Simpson Strong-Tie CBS44 is a standoff version that provides a 1-inch gap between the concrete and wood post to prevent rot, while the CB44 sits flush with the concrete surface. Both are 7-gauge steel bases for 4x4 posts, but the CBS44 offers better moisture protection for exterior applications.

Q: Can I use the CB44 for a free-standing carport post?

No, the Simpson Strong-Tie CB44 cannot be used for non-top-supported installations like unbraced carports or fences. This base is designed only for posts that have lateral support at the top, such as those connected to a deck frame or patio cover structure.

Q: What finish options are available for the CB44 column base?

The Simpson Strong-Tie CB44 comes standard with G90 Hot-Dip Galvanized coating, with optional stainless steel or black powder-coat finishes available. The G90 galvanized finish provides corrosion resistance suitable for most outdoor applications.

Q: How much concrete cover is required for proper CB44 installation?

The Simpson Strong-Tie CB44 requires a minimum of 3 inches of concrete side cover for full-load capacity. The base must be wet-set (cast-in-place) with the base plate flush with the concrete surface — it cannot be retrofitted to existing concrete.

Q: What certifications does the CB44 have for building code compliance?

The Simpson Strong-Tie CB44 is certified for International Building Code (IBC), International Residential Code (IRC), City of Los Angeles Building Code (LABC), City of Los Angeles Residential Code (LARC), ICC-ES Report ESR-3050, and Florida Building Code (FL10860). The ICC-ES report provides third-party verification of load values for building inspectors.