Should PVC schedule 40 pipe and fittings continue to be permitted for combustion exhaust venting? You and I have come across PVC that has gone from white to many colored shades: from light yellow to ...

SAN JUAN, Puerto Rico (AP) — More than 270 schools in Puerto Rico are modifying their schedules this week after one of the U.S. territory’s main water pipes recently broke. More than 165,000 clients ...

SAN JUAN, Puerto Rico (AP) — More than 270 schools in Puerto Rico are modifying their schedules this week after one of the U.S. territory’s main water pipes recently broke. More than 165,000 clients ...

Flying ready-made quadcopters is fun. Eventually, though, most hackers get the urge to build their own. One of the most challenging parts is building a robust airframe. [Thomas Jarrett] has an ...