UpCodes logo
Go To Full Code Chapter
Where the use of equipment with a boom that is designed to free fall (live boom) is prohibited, the boom hoist must have a secondary mechanism or device designed to prevent the boom from falling in the event the primary system used to hold or regulate the boom hoist fails, as follows:
1926.1426(b)(1)
Friction drums must have:
1926.1426(b)(1)(i)
A friction clutch and, in addition, a braking device, to allow for controlled boom lowering.
1926.1426(b)(1)(ii)
A secondary braking or locking device, which is manually or automatically engaged, to back-up the primary brake while the boom is held (such as a secondary friction brake or a ratchet and pawl device).
1926.1426(b)(2)
Hydraulic drums must have an integrally mounted holding device or internal static brake to prevent boom hoist movement in the event of hydraulic failure.
1926.1426(b)(3)
Neither clutches nor hydraulic motors must be considered brake or locking devices for purposes of this subpart.
1926.1426(b)(4)
Hydraulic boom cylinders must have an integrally mounted holding device.
Upcodes Diagrams

Related Code Sections

1926.1426(b) Cranes and Derricks in Construction, Preventing Boom Free Fall
Where the use of equipment with a boom that is designed to free fall (live boom) is prohibited, the boom hoist must have a secondary mechanism ...
1926.1426 Cranes and Derricks in Construction, Free Fall and Controlled Load Lowering
The use of equipment in which the boom is designed to free fall (live boom) is prohibited in each of the following circumstances ...