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PB/PBS Regular and Standoff Post Bases

PB/PBS

The PBS features a 1" standoff height. It reduces the potential for decay at post and column ends.

Material

PB—12 gauge; PBS—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.
  • 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).
  • PB—Holes are provided for installation with either 16d commons or 1/2" bolts for PB66 and PB66R; all other models use 16d commons only. A 2" minimum sidecover is required to obtain the full load.
  • PBS—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.
  • View step-by-step installation instructions in the Installer's Pocket Guide (S-C-INSTALL).
  • Some products may be installed with the Strong-Drive® SD Connector screw. See model table.

Options

PBS available in rough sizes (except for PBS46), contact Simpson Strong-Tie.

Related Literature

Load Tables

Load Values with Nails

    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.

Typical PB Installation
Typical PBS44A Installation
  1. Loads may not be increased for short-term loading.
  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) may use “Wind and SDC A&B” allowable loads.
  5. Download shall be limited by the design capacity of the post. See Post Capacities for common post allowable loads.
  6. For lateral loads for all PB models: F1 allowable = 765 lbs. F2 allowable = 1325 lbs.
  7. Designer is responsible for concrete design.
  8. 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.
  9. NAILS: 16d = 0.162" dia. x 3 1/2" long. See other nail sizes and information.

Load Values with Nails

    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.

  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 - 2615 960 840 6665

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
PBSee specific model numbers for code listings.
PB44 ESR-3050 RR25985 FL10849
PB44R ESR-3050 RR25985 FL10849
PB44Z No code listing. Please contact us for test data.
PB46 ESR-3050 RR25985 FL10849
PB46R No code listing. Please contact us for test data.
PB66 ESR-3050 RR25985 FL10849
PB66R ESR-3050 RR25985 FL10849
PB66Z No code listing. Please contact us for test data.
PBS44A ESR-3050 RR25985 FL10849
PBS44AZ No code listing. Please contact us for test data.
PBS46 ESR-3050 RR25985 FL10849
PBS66 ESR-3050 FL10849

Drawings

Part Orthographic Perspective
PBNone None
PB44
PB44
DWGDXF
PB44 front view
DWG DXF
PB44 right view
DWG DXF
PB44 top view
DWG DXF
High Wind-Resistant Construction D87: Post/Column to Foundation
DWG DXF
PB44
DWG DXF
PB44RNone None
PB44ZNone None
PB46
PB46
DWGDXF
PB46 front view
DWG DXF
PB46 right view
DWG DXF
PB46 top view
DWG DXF
None
PB46RNone None
PB66
PB66
DWGDXF
PB66 front view
DWG DXF
PB66 right view
DWG DXF
PB66 top view
DWG DXF
None
PB66R
PB66R
DWGDXF
PB66R front view
DWG DXF
PB66R right view
DWG DXF
PB66R top view
DWG DXF
None
PB66ZNone 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 D89: 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