PD3 Basket® Assembly

A reliable, industry proven solution for control joints that offers peace of mind

  • Maximizes the factor of safety
  • Reinforcement only when and where you need it
  • Optimized designs for lower reinforcement costs


Pit our PD3 Baskets against the competition:


VS. Double Tapered Baskets VS. Round Dowels VS. Texas 3's

 

A Proven & Industry Accepted
Dowel Basket

  • Used by the industry since 1997
  • Recommended in ACI 360 since 2004
  • Used in over 3 billion+ square feet of slab

A Forgiving &
Consistent Solution

  • Maximizes load transfer efficiency for joint stability
  • Minimizes restraint & random cracks
  • Improves subgrade tolerance because you can fix rutting ​right up until placement

Maximizes the Factor of Safety

  • Up to 8" of construction tolerance
  • Proprietary geometry of PD3 dowels allow for up​ to 15° of misalignment
    • Minimizes restraint and random cracks
    • Minimizes rip up and replace for contractor
    • Peace of mind for the engineer

Reinforcement Only Where & When You Need It

  • PD3 Baskets achieve joint stability and minimize random cracking with reinforcement only at the control joints, instead of throughout entire slab
    • Promotes jobsite safety -- less to trip over
  • PD3 Baskets are placed right before pour, and don't have to be driven over
    • Minimizes damage and unintended movement of baskets

Stocked & Ready for Shipment

Top Products in Stock at Both Plants For Quick Delivery

  • PNA has standardized its PD3 Basket offering to streamline manufacturing and stock inventory while still meeting design requirements
  • Customized, made-to-order baskets are still available and require a longer lead time

Take The Guesswork Out Of Dowel Design

Proprietary tools allow PNA’s engineers to customize every design to optimize slab thickness and dowel basket dimensions, resulting in lower installed costs

A Report from PNA's Dowel Calculator

PNA's Dowel Calculator

optimizes dowel size and spacing while meeting performance and factor of safety requirements​

REQUEST A CUSTOM DOWEL DESIGN

PD3 Baskets Installed in a Northern Illinois Warehouse

PD3 Baskets vs. Double Tapered Dowel Baskets

Double-Tapered Dowel Baskets have a Lower Factor of Safety

Lower Cross-Sectional and Bearing Area =​ Higher Stress and Deflection

  • In the typically specified construction tolerance window of ± 2 to 4 in.,​ double-tapered dowel baskets have:
    • 10% to 67% less cross-sectional area through which to transfer load from slab-to-slab
    • 48% to 84% less bearing surface area, which can lead to failure of the concrete around the dowel and resulting in measurable dowel looseness and increased differential deflection
  • If the crack is 2 inches offset from the center of the dowel, the maximum stress and dowel deflection of double tapered baskets is nearly two times that of PD3 baskets

No Degree of Misalignment Allowance

  • Any degree of misalignment in double-tapered baskets leads to the dowels always being loaded on an increasingly narrow tip
    • Due to the alternating design of PNA's single-tapered dowels, PD3 Baskets have up to 15 misalignment allowance without compromising cross-sectional or bearing area

DOWNLOAD WHITEPAPER: The Performance Risks of Double-Tapered Plate Dowels

PD3 Baskets vs. Round Dowel Baskets

Round Dowels Cause Restraint In 2-Directional Doweling

  • In 2-directional doweling, round dowels cause restraint, leading to random cracking and dominant joints
    • The use of round dowels for 2-directional doweling is not recommended in ACI 360R-10
    • Using round dowels in construction or saw-cut joints lock the joints, creating dominate joints unpredictably throughout the slab
    • Lose-Lose: Round dowels use near joint intersections cause corner cracking, but if you do not use dowels near the corner, it will crack anyways
  • Round dowels have no misalignment tolerance
    • Any degree of misalignment in round dowel baskets causes restraint and locks up the joint
    • PD3 Baskets have up to 15° misalignment allowance

ACI 360R-10 Guide to Design of Slabs-on-Ground, Page 48

DOWNLOAD WHITEPAPER: PNA PD3 Basket Alternatives to Round Dowel Standards

PD3 Baskets vs. Texas 3's

Texas 3's is a More Cumbersome System

More Steel

#3 or #4 Rebar throughout the entire slab, instead of only at the joints

More Labor

Labor required to tie and place all of that rebar

More Hazards

All of the employees on the site must avoid tripping on the rebar during the pour

Problems in Unpredictable Places

Trucks must be driven over rebar during pour, causing rutting of the subbase that cannot be corrected without removing the rebar

  • The rutting can cause cracks to occur at the high points of the subbase, and increases subbase friction, causing restraint

Rebar misalignment and subbase friction causes restraint, leading to out-of-joint cracking

  • Can cause individual slabs to act as one slab, creating a redistribution of joint openings and likely a dominant joint somewhere else in the slab
  • The location of the dominant joint is unpredictable, and therefore unprotectable, leading to joint spalling

 

DOWNLOAD WHITEPAPER: Causes and Performance Impacts of Dominant Joints in Slabs-on-Ground