Ignacio,

Just like kkchong, I feel very uncomfortable about double-layer repad. Recently, I had to design the reinforcement for 2 huge nozzles, that were close to each other. I've considered to use an internal pad - which leads to maintenance problems, since it may become difficult to clean - and also a double repad - a partial second layer, between the nozzles.

Even considering that the Code seems to consider everything inside the limits as useful reinforcement, even after FEM analysis of the arrangement, I was not confident to use these solutions. In my case, I used an analysis according to UG-42a) e App 1-7a, using necks and a repad as thick as possible.

Carlos Filgueiras