Currently, when designing various residential buildings, there has been a tendency to use monolithic reinforced concrete to cover significant spans. The article proposes the calculation of the outside racks of volumetric scaffold. The bearing capacity of the outside racks is reduced due to eccentric compression of the racks. Alignment of the bearing capacity of the racks provides a span decrease in the placement of outside racks. At the same time, all racks experience central compression and work in the same conditions. This article is a continuation of the paper dedicated to the calculation of volumetric scaffolding of monolithic slab formwork, published in this volume. Article considers the calculation of the outside racks of formwork scaffold, which, in contrast to the intermediate ones, experience bending stresses due to asymmetric load.
Currently, when designing various residential buildings, there has been a tendency to use monolithic reinforced concrete to cover significant spans, often using structures with a complex geometric structure. This article proposes a methodology for calculating the permissible load on the scaffold racks from the conditions of strength and stability using the classical approaches of materials mechanics and structural mechanics for this purpose, in order to optimize the consumption of materials and to identify real “steps” of racks horizontally and vertically, while observing the requirements for such structures for strength and stability. Cases of non-standard arrangement of outside scaffold racks of monolithic slab’s formwork are considered.
An important technological progress factor in mechanical engineering is improving structural and process solutions to production problems. The paper suggests a rational method of designs for hard shafts operating in a subcritical region, and for flexible shafts operating in a supercritical region.
One of the industry development factors is the advancement of design and technological solutions of production applications. Mining industry makes heavy use of cone crushers, with the main shaft being one of the main components under serious loads, thus requiring repair or replacement. The paper suggests the method to determine the critical speed of the main shaft of cone crushers in machining and the effect, which the type of fixing on metal-cutting machines has on the accuracy of its surfaces.
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