A ladder jack scaffold is a system designed to perform activities, such as:
installing building exteriors, trim, and finishes. Contractors widely use
ladder jack scaffolds because of their cost effectiveness, portability, and
quick erection and dismantling procedures, as well as their adaptability for
use in narrow spaces at construction worksites.



Setting-Up Ladder Jack Scaffolds



Before each use:
Inspect all scaffold components for damage.
Verify that all parts are working and ensure that all nuts are tightened.
Do not use bent, cracked, damaged or substitute parts.
If using a two- or three-rung bracket jack, ensure that the rectangular
brackets are fitted securely onto the ladder rungs in accordance with
manufacturer's specifications.
If using the side rail ladder jack, secure the upper round hooks and the lower
brackets of the device onto the ladder's side rails, then rest the brackets
onto the rungs, and secure the platform gusset plate onto the adjustable
notches at center.
The ladder jack must be designed and constructed so that it will bear on the
side rails and ladder rungs or on the ladder rungs alone. If bearing on rungs
only, the bearing area must include a length of at least 25.4 cm on each rung.
Ensure that the bracket jack is adjusted so that it is parallel to the ground
to create a level platform.
Securely tighten the ladder jack's wing nuts to prevent slippage during use.
If the scaffold system is defective, tag and promptly remove it from service.

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AplusA-online.de - Source: Occupational Safety and Health Administration