If an outrigger extends beyond 30 inches, which system must be used or the setup must be approved?

If an outrigger extends beyond 30 inches, which system must be used or the setup must be approved?

• A. Whale back or Delta system
• B. Base plate with straps
• C. Counterweight system
• D. Tie-back to building

Answer: (A)

When an outrigger extends far from the structure, the stability of the setup becomes the controlling factor because the tipping moment and lateral sway increase with projection. Beyond a 30-inch reach, you need a stabilization method that rigidly bracingly distributes the load and resists side-to-side movement. A Whale back or Delta system provides that enhanced stability by creating a strong, multi-point connection that spreads the forces and reduces leverage that could tip the rig. If you can’t use one of these stabilizers, the setup must be reviewed and approved by a qualified person to confirm that the alternative arrangement is safe and meets the necessary load and anchor requirements. Other configurations like base plates with straps, standalone counterweights, or tying back to the building don’t inherently offer the same level of lateral stability for long outreaches without that formal approval.

When an outrigger extends far from the structure, the stability of the setup becomes the controlling factor because the tipping moment and lateral sway increase with projection. Beyond a 30-inch reach, you need a stabilization method that rigidly bracingly distributes the load and resists side-to-side movement. A Whale back or Delta system provides that enhanced stability by creating a strong, multi-point connection that spreads the forces and reduces leverage that could tip the rig. If you can’t use one of these stabilizers, the setup must be reviewed and approved by a qualified person to confirm that the alternative arrangement is safe and meets the necessary load and anchor requirements. Other configurations like base plates with straps, standalone counterweights, or tying back to the building don’t inherently offer the same level of lateral stability for long outreaches without that formal approval.