Name: Simpson Strong-Tie PB 4-in x 4-in ZMAX Wood to concrete (cast in place) Base
Brand: Simpson Strong-Tie
SKU: 3048116
Price: 16.3 USD
Availability: InStock
Rating: 4.5 (60 reviews)

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Post and column bases secure the bottom of posts or columns to concrete and are perfect for decks or patio covers. Models are available for attaching to existing hardened concrete, wet concrete, as well as wood. The PB series provides a connection between a post (or column) for decks, patio covers and other top-supported structures.

Embeds in wet concrete after pour and is made to install flush with the concrete surface
Embossment in the seat of the base gives increased strength
Stress relief holes under the base resist tearing during loading
Nominal post size: 4x4
Made from 12-gauge steel
ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
Install with 16d common nails
Post bases do not provide adequate resistance to prevent members from rotating about the base and therefore are not recommended for non-top-supported installations (such as fences or unbraced carports).
Code compliance verified by ICC-ES Evaluation Report(s): ESR-3050, ESR-2523 (Index); State of Florida product approval(s): FL10860

General
Type	Base	Finish	ZMAX
Material	Steel	Package Quantity	1
Nails Required	Assortment	Manufacturer Color/Finish	ZMAX Galvanized, G185
Materials Connected	Wood to concrete (cast in place)	Series Name	PB

Dimensions
Common Measurement (T x W)	4-in x 4-in	Actual Width (Inches)	3.9665
Actual Weight (lbs.)	1.2	Actual Depth (Inches)	3.25

Features
Gauge	12	Screws Included	No
Stainable/Paintable	No	Adjustable	No

Certifications
CA Residents: Prop 65 Warning(s)	No

Warranty
Warranty	None

Miscellaneous
UNSPSC	30102900

Check out the Best Selling Base & Cap Hardware on Lowes.com

Review

4.5 out of 5

60 Reviews

89% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this product for straightforward installation and rock-solid structural stability. Most highlight how it eliminates deep post digging and keeps wood elevated off damp concrete to prevent rot. The rigid metal construction and spread-out design make maneuvering heavy posts simple, with reviewers calling it "perfect for setting posts." Many appreciate its versatility across decks, fences, trellises, and other projects, plus the availability of different sizes. A few note the prongs could extend deeper and mention compatibility considerations with certain lumber dimensions, but these minor concerns barely diminish the strong overall satisfaction.

Customer review summary generated by AI, including incentivized reviews.

60 Customer Reviews

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Junk! Absolute grabage!

Would Not Recommend

Pulled right out. Nothing was even attached to the pole yet. 16 a piece. I bought shorter 4x4's since I wasnt going down so far. Sprayed the bottom so I can't return those. Now I have to figure out how im going to get 2 feet of concrete, plus the rebar I drove into the earth out... AND I'm out around 250 between these, the concrete, the posts I can't use, not counting my time...

MarkSeptember 4, 2026

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/37f87fc9-6b96-524b-90e0-6be6b32a1d24

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Response from Simpson Strong-Tie

Hi Mark, this is Lexus from Simpson Strong-Tie. Thank you for your feedback. We’re sorry to see your experience with our PB44Z did not meet your expe... Read More

Simpson Strong-TieSeptember 8, 2026

SimpsonStrongTie

Supports

Would Recommend

Great supports for the large beams of decking, used with concrete and can’t complain. Galvanized and will prevent early rot.

GoosekeishaJuly 20, 2026
Verified Purchaser

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Would Not Recommend

I bought this to help with a fence post that had a very shallow hole because of roots. Worked perfect

Sleffler51July 20, 2026
Verified Purchaser

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		Name	Current Item Simpson Strong-TiePB 4-in x 4-in ZMAX Wood to concrete (cast in place) Base
		Ratings	60
		Type	Base
		Materials Connected	Wood to concrete (cast in place)
		Material	Steel
Simpson Strong-TieEPB 4-in x 4-in Painted Wood to concrete (cast in place) Base	Simpson Strong-TieEPB 4-in x 4-in Hot-dipped galvanized Wood to concrete (cast in place) Base	Simpson Strong-TieE-Z Base 4-in x 4-in Powder-coated Wood to concrete (retrofit) Base	Simpson Strong-TieABA 6-in x 6-in ZMAX Wood to concrete (retrofit) Base	Simpson Strong-TieABU 4-in x 4-in ZMAX Wood to concrete (retrofit) Base	Simpson Strong-TieCB 4-in x 4-in G90 galvanized Wood to concrete (cast in place) Column base	Simpson Strong-TieCBSTQ 4-in x 4-in ZMAX Wood to concrete (cast in place) Standoff column base	Simpson Strong-TieEPB 6-in x 6-in Painted Wood to concrete (cast in place) Base	Simpson Strong-TieOutdoor Accents Avant 4-in x 4-in Powder-coated Wood to concrete (retrofit) Base
41	36	175	232	103	31	20	41	36
Base	Base	Base	Base	Base	Column base	Standoff column base	Base	Base
Wood to concrete (cast in place)	Wood to concrete (cast in place)	Wood to concrete (retrofit)	Wood to concrete (retrofit)	Wood to concrete (retrofit)	Wood to concrete (cast in place)	Wood to concrete (cast in place)	Wood to concrete (cast in place)	Wood to concrete (retrofit)
Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel