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The following are rules of thumb, which are explained further in the accompanying diagrams: Diagram shows slab and rib width with rules of thumb formula. Slab depth is typically 75 mm (3 in) to 130 mm (5 in) thick. [5] [3] As a rule of thumb, the depth should be 1 ⁄ 24 of the span. [5]
Abrams' law (also called Abrams' water-cement ratio law) [1] is a concept in civil engineering. The law states the strength of a concrete mix is inversely related to the mass ratio of water to cement. [1] [2] As the water content increases, the strength of concrete decreases. Abrams’ law is a special case of a general rule formulated ...
Print/export Download as PDF; Printable version; In other projects ... Pages in category "Rules of thumb" The following 63 pages are in this category, out of 63 total
In the construction industry, the 1:5:200 rule (or 1:5:200 ratio) is a rule of thumb that states that: . If the initial construction costs of a building is 1, then its maintenance and operating costs over the years is 5, and the business operating costs (salary of people working in that building) is 200.
All of the EN Eurocodes relating to materials have a Part 1-1 which covers the design of buildings and other civil engineering structures and a Part 1-2 for fire design. The codes for concrete, steel, composite steel and concrete, and timber structures and earthquake resistance have a Part 2 covering design of bridges.
A rule of thumb for mix design is that the maximum aggregate particle size should be less than 1/10 of the nozzle diameter to ensure smooth extrusion. [ 8 ] Several studies have been conducted to examine the influence of aggregate size on mechanical properties for 3D printed concrete.
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It starts with a summary of the general rules for the execution and structure of technical drawings. Further it describes basic conventions for lines , views , cuts and sections , and different types of engineering drawings , such as those for mechanical engineering, architecture, civil engineering, and shipbuilding.