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Manufacturing and automation as a recovery path toward sustainable growth
Published in Harish Hirani, Technological Innovations for Effective Pandemic Response, 2023
Anchor bolts are primarily employed to attach objects to the concrete [18]. One side of the anchor bolt is anticipated to be fixed in concrete while the other side is kept projected from the concrete for anchoring objects. Depending on the object type and load, anchor bolt ends particularly the fixed end in concrete are required to be designed [19]. It follows the standard ASTM F1554-18.
Calculation of Miscellaneous Technical Parameters
Published in K.R.M. Nair, Power and Distribution Transformers, 2021
The height of the transformer is 6.5 m and the wind force acts at a level 3.5 m below the top level. The seismic force applicable at the location also will have to be considered for the design of anchor bolt, which is explained in Section 26.9. The calculation of anchor bolt design is explained in Section 26.9.
Effect of hollow bit local exhaust ventilation on respirable quartz dust concentrations during concrete drilling
Published in Journal of Occupational and Environmental Hygiene, 2019
David Rempel, Alan Barr, Michael R. Cooper
Large diameter holes (1–3 cm diameter) are drilled into concrete in commercial construction for structural upgrades (e.g., dowel and rod drilling) and for inserting anchor bolts for hanging pipes, conduit, or equipment. For dowel and rod drilling, a hole is drilled, then thoroughly brush-cleaned before epoxy is injected into the hole and rebar or dowel is inserted. For anchor bolts, the hole is drilled then the anchor bolt is pounded into the hole and tightened so that a wedge expands the insert and secures the bolt in the concrete. Anchor bolts can also be secured with epoxy or they can be screwed into concrete. Industrial construction projects may require thousands of these holes to be drilled, and this work can generate high concentrations of respirable silica dust, concentrations well in excess of the ACGIH Threshold Limit Value (TLV) of 0.025 mg/m3,[1] depending on the drill used, size of hole drilled, frequency of drilling, and environmental conditions.[2–6] Respirable silica dust can cause silicosis and lung cancer; [7] therefore, US OSHA recently reduced the permissible exposure limit (PEL) to 0.05 mg/m3.[8]