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A hard hat is a type of helmet predominantly used in hazardous environments such as industrial or construction sites to protect the head from injury due to falling objects (such as tools and debris), impact with other objects, and electric shock, as well as from rain. Suspension bands inside the helmet spread the helmet's weight and the force ...
A top hat, also known as a stove pipe or snoot, is a device used in theatrical lighting to shield the audience's eyes from the direct source of the light. [1] It is shaped like a top hat with a hole in the top, and the brim being inserted into the gel frame holder on a lighting instrument.
A typical Top used in rope making. A top is a hand tool with an iron loop and hook used in the creation and splicing of rope. A Top is used to simultaneously hold a piece of rope while providing a hole to separate the "lays" (or strands) of synthetic or natural rope for splicing. A variation of a Top, the gripfid, is used for ply-split braiding ...
c. 1910 top hat by Alfred Bertiel European royalty c. 1859 Austin Lane Crothers, 46th Governor of Maryland (1908–1912), wearing a top hat A top hat (also called a high hat, or, informally, a topper) is a tall, flat-crowned hat traditionally associated with formal wear in Western dress codes, meaning white tie, morning dress, or frock coat.
It is also commonly used to determine the amount of wind on the top of the structure. A Scandinavian tradition of hoisting a pine tree to the top of framed out buildings had a more functional purpose: when the pine needles fell off, the builders knew the wood frame below had cured/dried out so they could enclose the building. [2]
A general contractor is a construction manager employed by a client, usually upon the advice of the project's architect or engineer. [7] General Contractors are mainly responsible for the overall coordination of a project and may also act as building designer and construction foreman (a tradesman in charge of a crew).
The history of construction traces the changes in building tools, methods, techniques and systems used in the field of construction.It explains the evolution of how humans created shelter and other structures that comprises the entire built environment.
The width of devices that are mounted on a 35 mm "top hat" DIN rail generally use "modules" as a width unit, one module being 18 mm wide. For example, a small device (e.g. a circuit breaker) may have a width of 1 module (18 mm wide), while a larger device may have a width of 4 modules (4 × 18 mm = 72 mm).