FAT32 works for both OSes, but has a 4GB size limit per file, so it isn't ideal. However there is a 4GB file size limit. You could use NTFS but you will have to install additional software on the Mac in order to read AND write to the volume. exFAT then is the best option.
The riser duct is a problematic zone due to: -build-ups, alkali infiltration and chemical attack to the steel anchors. Following the general rule, we suggest lining the duct with bricks in the round sections and with castables in the square sections.
stress riser[stres rÄ«zâ²Är] Type:Term. Definitions. 1. A mechanical defect, such as a hole, in bone or other materials, which concentrates stress in the area and increases the risk of failure of the bone or material at that site.