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Lapping is a machining process in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine. Lapping often follows other subtractive processes with more aggressive material removal as a first step, such as milling and/or grinding .
Coarse scraping gives a resulting surface with 5-10 points per square inch while fine scraping yields 24-36 points per square inch. If desired, the surface can then be "frosted". A surface prepared in this way is superior in overall accuracy to any prepared by machining or grinding operations, although lapping can equal or exceed it over small ...
Construction Management education comes in a variety of formats: formal degree programs (two-year associate degree; four-year baccalaureate degree, master's degree, project management, operations management engineer degree, doctor of philosophy degree, postdoctoral researcher); on-the-job-training; and continuing education and professional ...
English cross bond has courses of stretchers and headers, but with the alternating stretcher courses offset by half a brick. Flemish bond consists of alternating stretchers and headers in each course. Header bond has courses of headers offset by half a brick. Stack bond consists of bricks laid directly on top of one another with joints aligned.
The following outline is provided as an overview of and topical guide to construction: Construction – process of building or assembling infrastructure. A complex activity, large scale construction involves extensive multitasking.
The scraper is a large piece of equipment which is used in mining, construction, agriculture and other earthmoving applications. The rear part has a vertically moveable hopper (also known as the bowl) with a sharp horizontal front edge. The hopper can be hydraulically lowered and raised.
Effective and efficient construction project management by training of construction managers. Construction safety management through structured safety management courses. Quality supervision, stores management and quality surveying through special structured courses. Enhanced quality and methods of instruction through training of trainers.
Macadam is a type of road construction pioneered by Scottish engineer John Loudon McAdam c. 1820, in which crushed stone is placed in shallow, convex layers and compacted thoroughly. A binding layer of stone dust (crushed stone from the original material) may form; it may also, after rolling, be covered with a cement or bituminous binder to ...