We use cookies on this site to enhance your user experience. By clicking "I AGREE" below, you are giving your consent for us to set cookies. Privacy Policy

text.skipToContent text.skipToNavigation

AC Adjustable Post Cap

AC

On This Page

The AC is designed to provide a secure connection between a beam and a post. This post cap is ideal for new or retrofit applications where structural support is needed. The AC features both minimum and maximum nailing patterns for different load options.

Key Features

  • Galvanized for corrosion resistance
  • Eliminates nailing into end grains
  • Load rated when installed in pairs
  • Maximum nailing option for increased loads

Material

  • 18 gauge

Finish

  • Galvanized. Some products available in ZMAX® coating or stainless steel. See Corrosion Information.

Installation

  • Fill all round holes for minimum load capacity. Fill all round and all triangular holes for maximum load capacity.
  • Use all specified fasteners; see General Notes.
  • Install all models in pairs to achieve allowable loads.

Related Literature

Wood Construction Connectors 2019-2020
C-C-2019
A catalog including new product information as well as any applicable specification and installation instructions for wood-to-wood and wood-to-concrete structural connectors.
Catalog
Conectores para la construcción con madera 2019–2020
C-C-2019SP
El catálogo incluye información sobre nuevos productos, así como especificaciones e instrucciones de instalación aplicables para conectores estructurales de madera a madera y de madera a concreto.
Catalog
High Wind Guide
F-C-HWG20
A comprehensive guide to help Designers select the most appropriate connections for challenging, high-wind regions.
Product Guide
Installer's Pocket Guide
S-C-INSTALL19
A bilingual pocket installation guide for connectors.
Product Guide
Deck Connection and Fastening Guide
F-DECKCODE20
A guide to recognizing deck deficiencies and building or retrofitting safer, longer-lasting outdoor decks, with 2018 IBC and IRC code-compliant solutions for using the latest connectors and fasteners.
Product Guide
Do Your Decks Meet Code?
DIY-DECKPATIO18
A tearpad showing deck connections on one side and patio cover system connections on the other.
Flier
Seismic Retrofit Guide for Raised Foundations
F-SEISRETRGD19
A seismic retrofit guide for homes with raised foundations. This guide helps homeowners understand how to inspect, evaluate and perform basic retrofit construction using Simpson Strong-Tie products.
Flier
A Complete Connector System for Building Decks
DIY-DCKPTIOCA20
A tearpad for Canada showing on one side the hardware needed for a deck system, and on the other side the hardware needed for a patio cover system.
Flier
Un système de connexion complet pour la construction de terrasses
DIY-DCKPTOCA20F
Un étui à deux faces pour le Canada présentant le matériel nécessaire pour un système de terrasse et un système d’abri de terrasse. Des recommandations de produits plus récentes sont incluses.
Flier
Connectors Installed on SCL Columns
T-C-SCLCLM21
A technical bulletin discussing the structural properties of the two different surface sides of SCL columns.
Technical Bulletin
Connectors Installed on SCL Columns
T-C-SCLCLMCAN20
A Canadian Limit States technical bulletin addressing typical installations of Simpson Strong-Tie® connectors on SCL columns as well as reduction factors for narrow-face SCL installations.
Technical Bulletin

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Ga. W (in.) L (in.) Coating/Material Packaging Qty.
AC4 18 3 9/16 6 1/2 Zinc Galvanized, G90 1
AC4RZ 18 4 7 ZMAX® 1
AC4SS 18 3 9/16 6 1/2 Stainless Steel 1
AC4Z 18 3 9/16 6 1/2 ZMAX® 1
AC6 18 5 1/2 8 1/2 Zinc Galvanized, G90 1
AC6RZ 18 6 9 ZMAX® 1
AC6SS 18 5 1/2 8 1/2 Stainless Steel 1
AC6Z 18 5 1/2 8 1/2 ZMAX® 1

Load Tables

    These products are available with additional corrosion protection.

    For stainless-steel fasteners, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

    Many of these products are approved for installation with Strong-Drive® SD Connector screws.

AC Post Caps Load Table
  1. Allowable loads have been increased for wind or earthquake loading with no further increase allowed. Reduce where other loads govern.
  2. Loads apply only when used in pairs.
  3. For minimum nailing quantity and load values, fill all round holes; for maximum nailing quantity and load values, fill all round and triangular holes.
  4. Uplift loads do not apply to spliced conditions. Spliced conditions must be detailed by the designer to transfer tension loads between spliced members by means other than the post cap.
  5. Structural composite lumber columns have sides that show either the wide face or the edges of the lumber strands/veneers known as the narrow face. Values in the tables reflect installation into the wide face. See technical bulletin T-C-SCLCLM for load reductions resulting from narrow-face installations.
  6. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

Load Values with Strong-Drive® SD Connector Screws

ModelNo. Nominal Post Size Fasteners Allowable Loads
Beam Flange Post Flange Uplift Lateral F1
CAPS

    These products are available with additional corrosion protection.

  1. Must be installed in pairs.
AC41 (Min) 4x 12-SD10112 8-SD10112 1430 715
(Max) 4x 14-SD10112 14-SD10112 2740 1485
AC61 (Min) 6x 12-SD10112 8-SD10112 1430 715
(Max) 6x 14-SD10112 14-SD10112 2920 2125

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

Related Products