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A concrete curved-chord through girder bridge, sometimes known as a camelback bridge, [2] [i] is a type of concrete bridge most common in the U.S. state of Michigan and the Canadian province of Ontario. [1] C.V. Dewart, the first professional bridge engineer of the Michigan State Highway Department, designed the type. [3]
The screed moves back and forth, as friction screeds or "roller" screeds level the concrete, filling holes and lowering any high spots. [1] Power screeds can be powered by gas, electricity or hydraulics. [citation needed] In concrete, prior to the mix drying, the concrete should be smoothed out on the desired surface.
Harry Soref founded the Master Lock Company in 1921 and patented an improved padlock in 1924 with a patent lock casing constructed out of laminated steel. Linus Yale Sr. invented a pin tumbler lock in 1848. Linus Yale Jr. improved upon his father's lock in 1861, using a smaller, flat key with serrated edges that is the basis of modern pin ...
EFCO offers formwork and shoring solutions for all types of concrete construction projects. [1] EFCO, formerly known as Economy Forms Corporation, is headquartered in Des Moines, Iowa, and currently has operations in 12 countries and manufacturing facilities in both Des Moines, Iowa, and Georgetown, Ontario, Canada. [2]
United States Navy Seabees use a screed (noun) to screed (verb) wet concrete. The form-work acts as screed rails.. In the United States, a person called a concrete finisher performs the process of screeding, which is the process of cutting off excess wet concrete to bring the top surface of a slab to the proper grade and smoothness.
The Weitzel Lock, was built between 1873 and 1881 directly south of the State Lock, and was the first lock to be operated by the federal government. At 515 ft (157 m) long, 80 ft (24 m) wide, and 17 ft (5.2 m) deep, it was the longest lock in the world upon its completion.
The normal key on the left will open only the lock that it goes to, but the skeleton key on the right will open any lock with this particular keyhole. Two warded lock keys and a homemade skeleton key A skeleton key (also known as a passkey [ 1 ] ) is a type of master key in which the serrated edge has been removed in such a way that it can open ...
Granolithic screed, also known as granolithic paving [1] and granolithic concrete, [2] is a type of construction material composed of cement and fine aggregate such as granite or other hard-wearing rock. [3] It is generally used as flooring, or as paving (such as for sidewalks).