We are adding cover plates to an existing continuous steel girder bridge as part of a strengthening rehabilitation, and are trying to give the contractor as much flexibility as possible by allowing both field welded (with bolted end connections) and field bolting options. Some of the flange...
We have a segmental retaining wall 8 to 15 ft in height that supports a roadway over a culvert. (Versa-Lok, Keystone, etc.) The wall has been in service 15 to 20 years, and several areas of the concrete blocks have severely deteriorated from what appears to roadsalt-laden runoff and...
I was wondering about the effect of the aspect ratio for light truck tires with respect to load capacity. Most of the discussion in other threads seems to center around performance, which is not a concern for how I drive my truck. I use it to haul things.
Apparently styling is a concern as...
Does anyone know where I can find information, history and commentary about the AASHTO Load Groups? Specifically, I'm looking for background, rationale, and individual loads and situations each load group was intended to model.
Performing a pothole repair on a 44 year-old bridge, a local municipality was using a small backhoe to remove the broken-up asphalt. They discovered they could keep scraping deeper and deeper into the concrete bridge deck, digging through the concrete as if it were gravel. They took four cores...
So far I've found no one that can answer why the pilots of fixed-wing aircraft typically sit on the port (left) side, yet helicopter pilots sit on the starboard (right) side. (I guess tilt-rotor pilots either switch off flight duties or swap seats at the appropriate time!)
My best guess is...
I'm curious as to the mechanics that causes nails to back out of wood. I understand that normal moisture and drying cycles can cause nails to back out of the holes, but I'm talking about nails that end up an inch or more out of the wood - far beyond the "swollen" size of wet wood - and can...
