On Jun 5, 4:12�pm, aemeijers wrote:
wrote:
On Jun 3, 11:29 am, hillpc wrote:
So does anybody know what exactly is the purpose of the pyramid
shape? The round top is to prevent reflective cracking of the asphalt
above.

If you make the bottom wider than the top, you have something of an
anchor to prevent frost heave. �It can't push out of the ground.. �I
was a little confused by the "upside down cone" mentioned earlier.

Hey, when I think of cones, I think of Ice Cream Cones. Wide end on top.
What can I say?

--
aem sends, suddenly craving one.....

OK, now I see. And now I want an ice cream cone...