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In civil engineering, a headwall is a small retaining wall placed at the inlet or outlet of a stormwater pipe or culvert. [2] In medicine, a headwall is the wall at the head end of a hospital bedspace. The bed abuts this headwall perpendicularly, which is furnished with equipment such as regulators for supplemental oxygen, regulators for ...
The St. Alban's Bay Culvert is functionally a concrete box culvert. However it has 40-foot-long (12 m) headwalls faced with random ashlar of local granite. This facing is about 9 inches (23 cm) thick, disguising a core of mortared lake boulders. The walls rise 2 feet 9 inches (84 cm) over the height of the roadbed to form a low railing.
Steel corrugated culvert with a drop on the exhaust end, northern Vermont. Culverts can be constructed of a variety of materials including cast-in-place or precast concrete (reinforced or non-reinforced), galvanized steel, aluminum, or plastic (typically high-density polyethylene). Two or more materials may be combined to form composite ...
Wing walls can be classified according to their position in plan with respect to banks and abutments. The classification is as follows: Straight wing walls: used for small bridges, on drains with low banks and for railway bridges in cities (weep holes are provided). Splayed wing walls: used for bridges across rivers. They provide smooth entry ...
Embedded in the side and center walls are three large water culverts that are used to carry water from the lake into the chambers to raise them, and from each chamber down to the next, or to the sea, to lower them. These culverts start at a diameter of 22 ft (6.71 m) and reduce to 18 ft (5.49 m) in diameter, large enough to accommodate a train.
Exterior insulation and finish system (EIFS) is a general class of non-load bearing building cladding systems that provides exterior walls with an insulated, water-resistant, finished surface in an integrated composite material system. EIFS has been in use since the 1960s in North America and was first used on masonry buildings.
Channel patterns are found in rivers, streams, and other bodies of water that transport water from one place to another.Systems of branching river channels dissect most of the sub-aerial landscape, each in a valley proportioned to its size.
A weir on the Humber River near Raymore Park in Toronto, Ontario, Canada A weir on the Yass River, New South Wales, Australia, directly upstream from a shared pedestrian-bicycle river crossing A weir on the Tikkurilankoski rapids in Vantaa, Finland Time-lapse video of a new tilting weir being installed in the Caldicot and Wentloog Levels