Hmelton
0
Those are prefabbed slabs used for A/C units, etc. I have one under my A/C and it hasn't moved or cracked for over 5 years use with lots of vibration. You are probably fine, they are reinforced.
[Your mileage may vary, 4 out of 5 dentists agree, objects in mirror may be closer than they appear, standard terms and conditions apply,....]
[Your mileage may vary, 4 out of 5 dentists agree, objects in mirror may be closer than they appear, standard terms and conditions apply,....]