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Performance Analysis
Planter Security Barricade System (PSBS)
*Patent Pending

Stonewear PSBS design advantages compared to conventional "heavy object" barrier like a precast concrete planter:

1. Stonewear PSBS provides for actual increase in weight over precast concrete planters because of additional mass in shaped vehicular barrier hidden in planter. The hidden barrier is approximately 500 pounds per linear foot.

2. Stonewear PSBS provides for additional protection from larger vehicles by diverting crashing vehicle up into the air rather than just acting as a physical mass barrier. By diverting, rather than resisting, a large multiple in the barrier performance is achieved.

3. Stonewear PSBS can easily be augmented to an Enhanced Barrier by simply doweling into a concrete slab prior to the final concrete pour into the hidden Stonewear form.

For instance, a ¾", grade 60 steel reinforcing bar adds an additional 10,000 pounds of resistance every 12". With 1 ¼" rebar, the resistance increases to 30,000 every 26". See attached chart for more detailed information on doweling options.

Loads for ASTM A615 Grade 40 and 60 Rebar Dowels in Concrete

Footnotes:

1. Allowable load is the lesser of the load based on bond strength (adjusted for edge, spacing and elevated temperature effects) or steel strength.
2. See Temperature Sensitivity Curve for appropriate reduction factor when concrete temperatures exceed 111° F.
3. Allowable loads may be increased by 33% for short term loading due to wind or earthquake, provided the allowable shear load values do not exceed the allowable loads based on steel strength for ASTM A307 threaded rod.
4. Allowable load based on bond strength may be interpolated for concrete compressive strengths between 2000 psi and 4000 psi.
5. Allowable shear load values for rebar are limited to the allowable steel strength.
6. The anchors cannot be used to resist pullout forces in overhead and wall installations, unless proper consideration is given to fire conditions.