Shares of some top construction companies are up at 10 a.m.:
Fluor rose $2.97 or 6.5 percent, to $48.92.
FosterWhl rose $1.81 or 7.4 percent, to $26.22.
Quanta Services rose $.80 or 4.1 percent, to $20.47.
Shaw Group rose $1.30 or 3.8 percent, to $35.28.