12-04-2016, 02:34 PM
(11-11-2016, 06:16 PM)Viewfromthe42 Wrote: Weight reduction, for transportation and overall material cost. They can be used as conduits for anything, even air, if properly prepared.
I was working in a student residence highrise U/C. Main contractor was going around drilling the slabs near the edges of the building to release water that got trapped inside. They can hold an unbelievable amount of water.