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PBS Post Base

PBS

The PBS post base provides a connection between a post (or column) for decks, patio covers and other top-supported structures. By featuring a 1" standoff height, it reduces the potential for decay at post and column ends.

Key Features

  • Made from 12-gauge steel for strength
  • Provides a 1" standoff between post and concrete that meets code requirements
  • Available with standard or ZMAX® galvanization, which offers extra corrosion resistance for outdoor or treated-wood applications

Material

  • See table

Finish

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

Installation

  • Use all specified fasteners; see General Notes.
  • Install either nails or bolts; see General Notes, note d.
  • 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).
  • Embed into wet concrete up to the bottom of the 1" standoff base plate. A 2" minimum side cover is required to obtain the full load. Holes in the bottom of the straps allow for free concrete flow
  • Some products may be installed with the Strong-Drive® SD Connector screw; see model table.

Related Literature

Load Tables

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

   These models are approved for installation with the Strong-Drive® SD Connector screw. See the load values below.

  1. For higher downloads, solid pack grout under 1" standoff plate before installing PBS into concrete. Base download on column or concrete, according to the code.
  2. Concrete shall have a minimum compressive strength, f'c = 2500 psi.
  3. Multiply Seismic and Wind ASD load values by 1.4 or 1.6 respectively to obtain LRFD capacities.
  4. In accordance with IBC Section 1613.1, detached one- and two-family dwellings in Seismic Design Category (SDC) C may use “Wind and SDC A&B” allowable loads.
  5. 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).
  6. Download shall be reduced where limited by the design capacity of the post. See Post Capacities for common post allowable loads.
  7. Designer is responsible for concrete design.
  8. For lateral loads for all PBS models: F1 allowable = 1165 lbs. when using nails and 230 lbs. when using bolts. F2 allowable = 835 lbs. when using either nails or bolts.
  9. Structural composite lumber columns have sides that either show 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 due to narrow face installations.
  10. NAILS: 16d = 0.162" dia. x 3 1/2" long. See other nail sizes and information.
Load Values with Strong-Drive® SD Connector Screws
ModelNo. Nominal Post Size Fasteners Allowable Loads
Post Flange Base Bottom Uplift Lateral F1 Lateral F2 Download

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

BASES
PBS44A 4x 14-SD10112 - 1285 960 840 6665

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
PBSSee specific model numbers for code listings.
PBS44A ESR-3050 RR25985 FL10860
PBS44AZ No code listing. Please contact us for test data.
PBS46 ESR-3050 RR25985 FL10860
PBS66 ESR-3050 FL10860

Drawings

Part Orthographic Perspective
PBSNone None
PBS44A
PBS44A
DWGDXF
PBS44A front view
DWG DXF
PBS44A left view
DWG DXF
PBS44A right view
DWG DXF
PBS44A top view
DWG DXF
High Wind-Resistant Construction D93: Post/Column to Foundation
DWG DXF
PBS44AZNone None
PBS46None None
PBS66
PBS66
DWGDXF
PBS66 front view
DWG DXF
PBS66 left view
DWG DXF
PBS66 right view
DWG DXF
PBS66 top view
DWG DXF
None