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Understanding Slab Load Classes
How to calculate total physical pressure loads exerted by green concrete on temporary shoring structures.
The Math Behind Concrete Pressure
Shoring layouts must handle both gravity loads and dynamic lateral forces. This guide outlines the structural formulas used to calculate total design pressure per square foot, ensuring layouts are safe and secure.
Concrete Load Math
A direct breakdown of load calculations based on standard concrete placement variables:
| Design Factor | Pressure Formula Source | Estimated Design Load Component |
|---|---|---|
| Concrete Dead Load | Thickness x 150 lbs/cu.ft (24 kN/m³) | 100 lbs/sq.ft for a standard 8" slab |
| Surcharge Live Load | Standard working crew + tool allowances | 50 lbs/sq.ft (OSHA minimum standard) |
| Dynamic Pumping Shock | Boom discharge point dynamic multiplier | Include extra constant 20 lbs/sq.ft multiplier |
| Shoring Safety Factor | Structural yield standard boundaries | Apply minimum 2.0x safety factor across props |
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