grid-fixed.css

.row {
  margin-left: -20px;
  *zoom: 1;
}

.row:before,
.row:after {
  display: table;
  line-height: 0;
  content: "";
}

.row:after {
  clear: both;
}

[class*="span"] {
  float: left;
  min-height: 1px;
  margin-left: 20px;
  outline: 1px solid #ccc;
}

.span12 {
  width: 940px;
}

.span11 {
  width: 860px;
}

.span10 {
  width: 780px;
}

.span9 {
  width: 700px;
}

.span8 {
  width: 620px;
}

.span7 {
  width: 540px;
}

.span6 {
  width: 460px;
}

.span5 {
  width: 380px;
}

.span4 {
  width: 300px;
}

.span3 {
  width: 220px;
}

.span2 {
  width: 140px;
}

.span1 {
  width: 60px;
}​