Internet #100374868

Model #BCS2-2/4Z

Store SKU #294301

Store SO SKU #592854

BCS ZMAX Galvanized Post Cap/Base for Double 2x Beam, 4x Post

  • Dual-purpose post cap/base to beam connector
  • Secures bottom of posts or columns to concrete
  • Great for use on patios and decks
  • See More Details

Frequently Bought Together


Product Overview

Deck Glamour Photo

Deck It Out

Strong decks bring beauty and entertaining space to your outdoor living area

Deck Glamour Photo

Make Your Deck Beautiful and Safe

Building a safe, strong deck starts with the proper connectors and fasteners

Photo of a deck being built

Deck Building Tips and Tricks

Installing corrosion-resistant connectors and fasteners helps extend the life of your deck

SDWH Screw being installed into ledger

Ledger connections critical for deck safety

Strong-Drive® SDWH Timber-Hex HDG screw delivers high-strength, wood-to-wood connectivity, such as deck ledger applications

DTT2Z guardrail install

Guardrail Installation Tips and Tricks

Don’t take chances with guardrail connections. DTT2Z deck tension ties fasten guardrails to deck framing.

DTT1Z install

Securing the Deck to the House

Install DTT1Z as a tension tie to meet building codes and eliminate the need to access to the floor joists inside the home

LSCZ install

Take the Step to Secure Deck Stairs

LSCZ adjustable stair-stringer connector offers a concealed connection between the stair stringer and the carrying header or rim board

Tight LUS26Z install shot

Joist Hangers

Provides bearing and uplift resistance

Tight H1 install shot

Hurricane Ties

Ideal for preventing lateral movement of joists

Tight SD screw install photo

SD Connector Screw

The only screw approved with Simpson Strong-Tie connectors

Tight install shot of LCEZ4

Post Caps

LCEZ end post caps provide a post-to-beam connection in new or retrofit deck applications

Tight PBSZ install photo

Post Base

Features a 1 in. standoff to resist wood decay

Stainless-steel connector product shot

Prevent Corrosion

Deck-Drive DWP stainless-steel fasteners are recommended for higher-exposure environments or applications

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 BCS allows for the post to beam connection of 2-2xs to a 4x post or 3-2xs to a 6x post. Double-shear nailing between beam and post gives added strength.
  • Provides a positive connection for a post to a wood deck
  • Stronger than angled nailing or screw fastening
  • Reduces the chance of the post splitting and eliminates nailing into end grain
  • Not recommended for non top-supported installations (such as fences or unbraced carports)
  • Nominal size: Double 2x beam, 4x post
  • Made from 18-gauge steel
  • ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
  • Install with 10d common nails or #9 x 1-1/2 in. Strong-Drive® SD screws
  • Shop all Simpson Strong-Tie here.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.



Beam Width
Double 2x
Nominal Post Size (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Cap Type
Post Cap
Connector Finish
G185 Galvanized
Fasteners Included
Fasteners Not Included
No Additional Features
Material Connector Compatibility
Wood to Wood
Number of Pieces
Package Quantity
Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
Limited Warranty

Questions & Answers


What's the difference between this BCS ZMAX model and the one that's just BCS?

Asked by Andy August 13, 2020

The difference is the finish - the BCS2-2/4 has the standard G90 galvanized finish which provides a low level of corrosion protection and the BCS2-2/4Z has the Z-MAX G185 galvanized finish which provides a medium level of corrosion protection. Please see the Corrosion section of our website for the recommended finish based on your application: Thank you!

How do you use these to support a joint in the beam where four 2x10s meet up?

Asked by Jim August 9, 2020

Post cap allowable loads are for a continuous beam. Unless otherwise noted, the beam may be spliced at the centerline of the post, and the maximum allowable download for each spliced beam is one half of the cap’s tabulated allowable download. Eccentricity induced in the post by spliced beams must be evaluated by the Designer. Tabulated uplift and lateral loads do not apply to spliced beam conditions. When spliced beams must be connected together to transfer design tension loads (lateral loads parallel to the beams), the connection must be by means other than the post cap. Thank you!

What kind of beams will fit? 2x ? 2x6s? 2 of them?

Asked by BigPRO June 30, 2020

The BCS2-2/4 is sized for a double 2x (minimum 2x4) over a 4x post. Thank you!

What size nails should we use? The instructions say to use 16d (3.5" nails) but the post is a 6x6...

Asked by CarryTheTwo December 24, 2019

The nail holes are slightly offset, enough that the nails will slide past each other. Thank you!

Can these be used for triple 2x12?

Asked by Henry May 13, 2019

Yes, one side is smaller to fit 3 each (2x12(?) and the other to fit over a 6x6

Is there a 6 in. post cap for a double beam instead of a triple beam

Asked by LTC April 17, 2018

This for a triple 2 by joist beam

Why are you calling it 3 in x 6 in? It's for connecting 3 sistered 2xs, which is more like 4.5" ...

Asked by Confused September 12, 2017

The correct Simpson part # is BCS2-3/6Z. One end of the connector opening is 4 5/8 in wide (three sistered 2 by xx joist) and the other end opening is 5 9/16 in wide (6 by 6 post).

Attaching to existing beam

Asked by James92026 October 30, 2015

Did you ever find the 4x4 to 4x4 connector? and if I use this instead will it not fit, in other words is a double 2x2 the same fit as a 4x4

Customer Reviews

  • 83 Customer Reviews
  • 4.6 out of 5 stars overall
97% of customers recommended.
Overall Ratings
Sort By:
Works great as expected....
Works great as expected.
Was this helpful?
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
Was this helpful?
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
Was this helpful?
Worked great for my deck.....
Worked great for my deck..
Was this helpful?
Does a good job....
Does a good job.
Was this helpful?
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
Was this helpful?
Great product...
Great product
Was this helpful?
I recently used these to secure my beams to my...
I recently used these to secure my beams to my post for a large deck project. They are easy to install and create a tight secure fit. A must have for anyone completing a deck project in my opinion.
Was this helpful?
Great strength and support...
Great strength and support
Was this helpful?
Great product. Exactly what you need to attach double 2-by...
Great product. Exactly what you need to attach double 2-by deck beams atop 4x4 posts. Too bad local H-D stores do not stock them.
Was this helpful?
Review this Product
Share your thoughts with other customers