It would depend almost entirely on what that room is USED for, i.e., the type of occupancy. If it is a storage room in a retail store, you are not allowed to have more than one person for each 300 sq ft (i.e., 5 people), but if it is a classroom in a K-12 education occupancy, you would be allowed one for each 20 sq ft of open space (net floorspace), i.e., 72 people.
The NFPA Life Safety Code, or other similar code adopted in your jurisdiction, will determine what load factors to use for your particular occupancy, whatever it is.
After you know the permissible load by area, you then calculate the permissible exit load, based upon the location, type and width of the various doors. If the exit load is smaller than the area load, your occupancy is limited by the exits.
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Net floorspace divided by load factor from occupancy tables of applicable code. For instance, NFPA 101 requires 7 sq ft per person in compact dance areas and 15 sq ft per person where there is seating, provided it is not fixed seating. You then calculate the egress load by allowing one person for each 0.2 inches of doorway or hallway (whichever is narrower), or 0.3 inches if there are stairs. The lower number (area load or egress load) is the overall limit for that occupancy. There are, however, many other factors for each specific location, such as whether the main doors can accommodate at least 2/3 of the max load, whether there are sprinklers, whether there is live entertainment, what floor of the building it's on, what kind of building structure it is, etc.
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It means One (1) Twenty foot, full container load for a minimum order. What is 1x20? -- One twenty foot container FCL -- Full Container Load
It depends on what load is on the wall.
Please re-word your questions a little better. There is insufficient information to answer this question.