During column setting, a base plate rocks because the shim pack is missing at one corner. The crane is still holding the column. What is the best field action?
Correct Answer
A) Set the column on level finished floor, pregrouted plate, leveling nuts, or adequate shims before release
OSHA 1926.755(a)(3) requires columns to be set on level finished floors, pregrouted leveling plates, leveling nuts, or shim packs adequate to transfer construction loads. Other choices release an unstable column or distort the anchorage.
Why This Is the Correct Answer
OSHA 1926.755(a)(3) requires columns to be set on level finished floors, pregrouted leveling plates, leveling nuts, or shim packs adequate to transfer construction loads. Other choices release an unstable column or distort the anchorage.
Why the Other Options Are Wrong
Option B: Release the crane and grout later, leaving column base bearing unverified
Choice B (Release the crane and grout later) is rejected because it leaves out the controlling Column base bearing result: Set the column on level finished floor, pregrouted plate, leveling nuts, or adequate shims before release.
Option C: Tighten one anchor rod to pull the plate down unevenly
In metals work, Tighten one anchor rod to pull the plate down unevenly is the wrong selection for Column base bearing: the choice would not get the project to Set the column on level finished floor, pregrouted plate, leveling nuts, or adequate shims before release, which is the Column base bearing result verified by the source.
Option D: The erection crew should cut a notch in the base plate to make it sit flat
The trap in D is Cut a notch in the base plate to make it sit flat. That selection is wrong because the option does not produce the required Column base bearing outcome, Set the column on level finished floor, pregrouted plate, leveling nuts, or adequate shims before release.
Memory Technique
Picture a stormwater map on the jobsite; column base bearing is solved by the action that leads to Set the column on level finished floor, pregrouted plate, leveling nuts, or adequate shims before release.
Reference Hint
Open 29 CFR Part 1926, Subpart R - Steel Erection; use 29 CFR 1926.755(a)(3) to confirm that OSHA 1926.755(a)(3) requires columns to be set on level finished floors, pregrouted leveling plates, leveling nuts, or shim packs adequate to transfer construction loads.
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