Do the tower foundation bolt shims need to be welded?
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The steel structure foundation bolt washers need to be welded to the bottom plate of the column foot. When installing vertical static equipment such as towers or vertical tanks, do their foundation bolt washers also need to be welded to the bottom plate of the skirt base after installation?
Yes, to ensure the stability and safety of the equipment, after vertical static equipment such as towers or vertical tanks is installed, their foot bolt shims need to be welded to the base plate of the skirt to secure the equipment and enhance the structural stability. .
What are the risks if welding is not done?
GB 50231-2009 General Specifications for Construction and Acceptance of Mechanical Equipment Installation Projects specifies this clearly
He’s talking nonsense; how could a shimming plate be welded to the bottom plate of the skirt? Shimming plates are meant to be used for leveling and adjustment, and they need to accommodate any expansion or contraction. If welding is used, the stress will be transferred to the equipment, which is harmful to it.
The shims usually have elongated holes, allowing for positional displacement, as shown in the figure above.
The poster is probably referring to the shimming plate used under the base ring plate of vertical (tower) type equipment to adjust its verticality, rather than the shimming plate on top of the bolt seat.
That thing used for alignment and leveling isn’t called a “shim”, right? Those are called flat shims and inclined shims