I'm certifying some monorail crane beams for a customer. The customer wants the rails (All I-beams) marked with the load capacity. I've looked into the ASME B30.11 and B30.16 for the marking requirements but they only mention the actual lifting equipment (marking the hoists, lifting equipment...
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I'm specking an API-650 type tank to hold potable water. I understand what a dome and cone roof would look like, but the spec's description of an umbrella roof is a little vague. Does anybody have a source for what one of these roofs would look like, or how they're...
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Does anybody know a good source for cable reactance curves for 400hz ac power? My design has a 400 hz, 60 hp g-rater with a distribution panel with 20 and 30 amp branch circuits.
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My guestion is: can you use a thermal overlaod relay without subsequent contactors on the load side of a vfd? Then use the signal from the relay to a plc to shut down the system. The system being multible motors with acme screws in a lift (non-personnel) application.
