10 To 7 Mod - Top

Never stack a 10 to 7 mod top directly above another mod top of the same orientation. Instead, alternate:

In landscaping and heavy civil construction, "mod top" blocks are famous for building curves. A standard straight block has the same top and bottom width (e.g., 10 to 10). However, a 10 to 7 mod top block is used exclusively for concave curves (curving inward relative to the wall face). 10 to 7 mod top

When sourcing a 10 to 7 mod top, check the spec sheet for these values: Never stack a 10 to 7 mod top