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AAW An acronym for anti-aircraft warfare. aback (of a sail) Filled by the wind on the opposite side to the one normally used to move the vessel forward.On a square-rigged ship, any of the square sails can be braced round to be aback, the purpose of which may be to reduce speed (such as when a ship-of-the-line is keeping station with others), to heave to, or to assist moving the ship's head ...
The civil engineering term may also refer to the structure supporting one side of an arch, [4] or masonry used to resist the lateral forces of a vault. [5] The impost or abacus of a column in classical architecture may also serve as an abutment to an arch. The word derives from the verb "abut", meaning to "touch by means of a mutual border".
The narrow section at mid-span gives the bridge profile a slight arch shape making this design particularly useful when large headroom is required. The profile also makes the bridge more architecturally pleasing than a beam bridge. Rigid-frame design may be the most efficient bridge type for spans between 35 and 80 feet (11 and 24 m). [5]
A revolving door typically consists of three or four doors that hang on a center shaft and rotate around a vertical axis within a round enclosure. Rib vault The intersection of two or three barrel vaults. Ridge board A structural member that runs the length of the ridge (high point) on a sloped roof to which the upper ends of rafters are attached.
The term "covered bridge" is sometimes used broadly to describe any "bridge-like structure" that is covered by a roof. However, bridge-like structures such as Heilig-Geist-Spital, a hospital built out over two arched spans into the Pegnitz river in Nuremberg, but which did not ever provide a complete crossing to the other side, are not included ...
Related: Cancer-Causing 'Forever Chemicals' Found in Many Kinds of Contact Lenses, Study Finds The issue, the statement says, comes from a synthetic polymer called fluoroelastomer, which is used ...
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Other repairs may have some urgency, such as broken water pipes, broken doors, latches or windows, or a leaky roof or water tank, and this factor can certainly justify calling for professional help. A home handyperson may become adept at dealing with such immediate repairs, to avoid further damage or loss, until a professional can be summoned.