Shares of some top construction companies are up at noon:
Fluor rose $2.68 or 5.8 percent, to $48.63.
FosterWhl rose $2.12 or 8.7 percent, to $26.53.
Quanta Services rose $.88 or 4.5 percent, to $20.55.
Shaw Group rose $1.86 or 5.5 percent, to $35.84.