Certified Welding at Cell Phone Tower

We were awarded the contract to do the cell phone tower modifications at a site in LA.

First I had to become an LA Certified Welder.  That was not a problem but very involved – I had to make a special trip to LA, do a welding test I had already completed for my AWS welding certification, and a 50 question test.

The contract required us to install 12 – 1-3/4″ x8′ anchor rods and weld 6 large gussets equally around the tower 20′ high.

To install the anchor rods we had to remove the grout from under the base plate.

The rods needed to be epoxied 7′ into the existing foundation with is 22′ deep.

Before we installed the rods I cut a bevel on the end of the rod so it would go into the epoxy easier without leaving any air bubbles in the epoxy.

Rods epoxied into the foundation

Before installing the gussets I needed to remove all the galvanizing from the plates and the tower  in the weld area so the galvanizing would not contaminate the weld.

I then used a crane to “fly” the gussets in to place.  It took only about 1 1/2 hours to fly all the gussets in.

Welding the gussets in.  I bounced around the tower as I welded so the tower would not get too hot in any one area.

Welding completed and painted.  I also caulked the areas with silicone which were not welded where water could get between the gusset and the tower to keep the rust out.

All told this was a nice project and I enjoyed doing the work.  From coordinating the equipment, subcontractors, and materials to installing the anchors, welding the gussets, and getting final inspections everything what quite well.

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