The weld was made with NO PREP and without removing the paint from either surface. SO the interior of the weld is well, "as good as the burned paint inside the weld".
A mark of the lack of quality: The weld slag was not removed after cooldown. So what ever is there still cannot be looked at.
Other: Lookout! The structural "supports" are only half-on the remnant of concrete ledge around the slab. No strength in the concrete under the half of the hollow steel tube (?) that is touching the concrete ledge. Guaranteed to crack soon under movement and vibration: The concrete ledge like that has no strength vertically against loads.
But at least the job is consistent. EVERY vertical member will fail the same way.