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Old 01-26-2012, 10:13 PM
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Quote:
Originally Posted by xtreem3d View Post
I kinda get the gravity thing for block buried 4 rows deep but what about the top row on a steep hill that water runs down...can gravity hold that block in place for long? i'm not an expert but i think will continue to use the lips just for piece of mind...informative post Jim
Which I *believe* your thought sorta coincides with my thoughts. Like the picture I posted. It's a very short wall, you can see the movement that took place, and of course it lacks the proper ingredients (gravel, etc). But the wall is so short, what gravity is there to hold the block in place?

That's why block like cornerstone uses 3/4" aggregate placed in the cores. The aggregate doesn't break and it doesn't shear.
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