PB/PBS Regular and Standoff Post Bases

060a-2015

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

Material: PB – 12 gauge; PBS – see tables.

Finish: Galvanized. Some products available in ZMAX® or HDG; 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).
  • 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.
  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.

 

  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.
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