Common access towers

Similar to towers, drum elevations are diaated by the NPSH, as illustrated in Exhibit 5-7, minimum clearance, common platforming, and maintenance and operator access. Within structures, especially chemical facilities, drums could be elevated above the minimum requirements of accommodate floor space avail-... 

In the older, induced-draft wooden cooling towers, a common problem is that the wooden slates have broken up. There is usually an access inspection door at the base of the cell. Often, the water distribution holes are plugged or there are large holes broken into the deck. Water is not supposed to overflow around the outside of the cooling tower. On some cooling towers the fans are driven by belts, which can slip or the fan blade pitch is set too low, low being less than 15°, maximum being 23°. 

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