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Examples of punch-list items include damaged building components (e.g. repair broken window, replace stained wallboard, repair cracked paving, etc.), or problems with the final installation of building materials or equipment (for example, install light fixture, connect faucet plumbing, install baseboard trim, reinstall peeling carpet, replace ...
A drift "punch" is misleadingly named; it is not used as a punch in the traditional sense of the term. A drift punch, or drift pin, or lineup punch, is used as an aid in aligning bolt or rivet holes prior to inserting a fastener. A drift punch is constructed as a tapered rod, with the hammer acting on the large end of the taper.
In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw. There are three different drive systems: manual, ratchet, and hydraulic. [2]
Mechanism of a typical hole punch. The essential parts of a hole punch are the handle, the punch head, and the die. The punch head is typically a cylinder, with a flat end called the face. The die is a flat plate, with a hole matching the head. The head can move, while the die is fixed in place.
The gaskets for flanges can be divided into four major categories: Sheet gaskets; Corrugated metal gaskets; Ring gaskets; Spiral wound gaskets; Sheet gaskets are simple, they are cut to size either with bolt holes or without holes for standard sizes with various thickness and material suitable to media and temperature pressure of pipeline.
The Pantheon in Rome is an example of Roman concrete construction. Caesarea harbour: an example of underwater Roman concrete technology on a large scale. Roman concrete, also called opus caementicium, was used in construction in ancient Rome. Like its modern equivalent, Roman concrete was based on a hydraulic-setting cement added to an aggregate.
Facade of the Pantheon, Rome. By far the most famous roofed round Roman building is the Pantheon, Rome.However this sharply differs from other classical tholoi in that it is entered though a very large flat temple front with a projecting portico with three rows of columns, while the rest of the exterior is a blank wall without columns or windows, so the circular form is rather obscured from ...
This is usually used to hold up a roof, creating a largely open space beneath, for whatever use the building is designed. The horizontal elements are called by a variety of names including lintel , header, architrave or beam , and the supporting vertical elements may be called posts , columns , or pillars .
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