70 lb. Galvanized Steel Umbrella Base with Casters - 12'' Base Tube

Definition

The static weight rating refers to the maximum weight the chair can hold when the load is applied gradually and remains stationary.

Test Method

The test involves evenly distributing weight onto the chair, and maintaining it in a stationary position.

Purpose

To measure the chair’s ability to support a constant, stationary load without failing.

Definition

The dynamic weight rating indicates the maximum weight the chair can withstand when subjected to a sudden impact or movement.

Test Method

This rating is determined by a "drop test," where a weight is dropped onto the chair from a height of 6 inches above the seat.

Purpose

To assess the chair’s durability and strength when exposed to sudden, impact forces, simulating real-world use.