Solid through
Used to hold front and rear tube sheets
Solid and hollow
Hold inner and outter sheets together 3/16 “ diameter tell tale hole. Solid has tell tale hole 1” in to water side.
Girder
Used to strengthen the flat portion of crown sheet
Dog
Hand and man hole covers
Radial stay
Crown sheet, supersceded girder stay
Diagonal stay
Used above tubes to stay flat portions of heads
Gusset
For the ends of shell, diagonal and riveted