Dear Goto san,
Attach is ABPR3-C-T-HA-0002: HRSG Foundation Base Raft Layout and Details that we would like to inform you with for your consideration to include the Pocket reinforcement at HRSG Stack foundation.
As aware at Stack foundation there are 4 pockets (depth is 110mm.), the rebar shear key should be shown on the drawing plan as the same to HRSG foundation even though the typical detail is available. But in order to prevent any confusion or mistakes at site work, we think that should be also considered.
For your kindly consideration, please.