Document RJYkrzORELVoN46pBGq3kqeza

BASIC APPLICATION SECTION 4 DUAL-TEMP equiphent-& ductwork Page 11 FLAT HEAD INSUL. (cont'd.) 4A1.7 A 6" stagger of the end Joints shall be maintained by staggering the ends of each course as It is Started in the middle of the head* (See figure 9) As eaqh block Is applied the retaining washers shall be put on the plxis and the block pressed firmly against the head while the Mastic Is still soft. 4A1.8 As each course of blocks Is applied the end blocks shall be trimmed flush with the shell of the vessel. Care must be taken to prevent trimming them less them the shell radius. The most satisfactory method is to let them extend about beyond the shell surface and grind them down with the shell insulation when it is applied, (see Figure 9.)