Posted: 1/26/2014 9:35:49 AM EDT
[#14]
Quote History Quoted:
surban1 is correct... floor loading is conservative on an epic scale. Let's put things in proper perspective. A 250 lb man, standing on one foot, is probably standing on less than 1/2 square foot. That's over 500 lbs/ft² without any consideration for the dynamics of motion, which could easily triple that load. If floor loading was so tenuous, that guy would be deforming the floor noticeably. Not happening. Another gut-check... when you move that 300 lb fridge on a dolly, one of those wheels on the dolly are probably carrying the load on a footprint less than 4 in². So, 150 lbs on spot that small equates to around 5,000 lbs/ft².
So, when an architectural load is calculated, it is a structural load for the entire floor structure, and has several times the real capacity added as a factor of safety. They are not talking about a point load. In addition, the area in the room has a huge impact on sustained load bearing, where the areas against walls and other structural features add substantially to the practical loads. A 700lb safe with a footprint around 3 ft² is trivial, seriously trivial. Your 4-post bed with two adults in it are probably imposing many times that point loading.
Put your safe wherever you want, and stop worrying about permission or damages. You have no concerns... View Quote View All Quotes View All Quotes Quote History Quoted:
Quoted:
usually min floor capacity is 40 #/ft2, but that's for the ENTIRE floor square footage (ie, a 10X10 room would have to be able to support 4000#s over it's entire area.) a smaller area can safely carry much more than that (think of 3 "husky" guys standing near each other) as the floor, subfloor and supports distribute that load to/over a much larger area. unless when this guy walks around his place, the floor or walls shake, i'd bet that the floor will safely handle 700#s (especially if it's put near an outside wall or near a load bearing wall). if he were talking about a 2000# safe, i'd be concerned/scared, but for 700, i'd say minimal chance of disaster.
surban1 is correct... floor loading is conservative on an epic scale. Let's put things in proper perspective. A 250 lb man, standing on one foot, is probably standing on less than 1/2 square foot. That's over 500 lbs/ft² without any consideration for the dynamics of motion, which could easily triple that load. If floor loading was so tenuous, that guy would be deforming the floor noticeably. Not happening. Another gut-check... when you move that 300 lb fridge on a dolly, one of those wheels on the dolly are probably carrying the load on a footprint less than 4 in². So, 150 lbs on spot that small equates to around 5,000 lbs/ft².
So, when an architectural load is calculated, it is a structural load for the entire floor structure, and has several times the real capacity added as a factor of safety. They are not talking about a point load. In addition, the area in the room has a huge impact on sustained load bearing, where the areas against walls and other structural features add substantially to the practical loads. A 700lb safe with a footprint around 3 ft² is trivial, seriously trivial. Your 4-post bed with two adults in it are probably imposing many times that point loading.
Put your safe wherever you want, and stop worrying about permission or damages. You have no concerns...
Thread got off to a rough start but I appreciate the replies, thanks!
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