Float columns with clear

Then after the floating elements we can "clear" the floats to push down the rest of the content.

.div-1a {
 float:left;
 width:190px;
 height:200px;
 background:#F03; }
.div-1b {
 float:left;
 width:190px;
 height:200px;
 background:#0CF; } 
.div-1c {
 clear:both;
 color:#333;
 background:#FF9; }

div-1a

div-1b

div-1c