A base jack is an adjustable scaffold support component used to establish a level within the assessed arrangement.
What does this mean for your project?
The visible adjustment mechanism can suggest that users may make small corrections themselves. That conclusion is inappropriate. Its position relates to the complete arrangement and the limits applicable to the particular system and design, rather than simply to the appearance of a platform.
During preparation, describe changes in ground level and unusual support conditions. You do not need to prescribe an extension length. The provider assesses appropriate support and identifies missing information, including possible construction beneath the paving or other surfaces around the intended footprint.
If movement or settlement becomes apparent during work, report the location and observation. Do not turn a jack yourself to make a platform appear level again. A local adjustment can have consequences extending beyond the immediately visible part of the structure.
Explore this subject through Base plate and Standard.
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May a user adjust a base jack?
Not on their own initiative. Have the observed condition assessed and handled by the responsible scaffold provider.
Does the planner calculate jack positions?
No. Its drawing uses overall elevation dimensions and is not a technical design for support components or erection.