GE SIGNA Voyager Pre-Installation page 110

SIGNA Voyager Pre-Installation
Direction 5680008–1EN, Revision 2
5. In case the gap in between ISC and ICC is 15mm (minimum gap) and slope is down to the
center from both side like "V" shape, the slope specification is < 0.25 deg.
Illustration 4-13: In case the gap in between ISC and ICC is 15mm
110 3 ISC and ICC Construction Requirements