Make sure items are spaced so that the weight is evenly distributed over the chords.
Weight limit attic.
So if your ceiling is unfinished you have some excess carrying capacity up there.
Next consult a span table to cross reference the spacing and span to find the required fb value for that table s load limits.
Is a safe estimate.
This is because the ladder is simply not strong enough to support any more weight and you are putting unreasonable pressure on the attic access ladders every time you break the weight limit.
An uninhabitable attic designed for limited storage can handle 20 pounds per square foot live load.
A typical load is 5 and 10 pounds per square foot.
If the attic has the potential to become a regular living space talk with a contractor about adding a fixed stairway.
The joists are what support the weight.
Access to attic storage.
The dead load on the bottom chord of a truss varies with the weight of materials attached to it such as drywall on the ceiling.
If you want to use your attic on a regular basis or to store large items you may need to enlarge the access opening and install an access ladder or drop down stairs.
Hard to measure since i already have a lot of stuff in the attic but i think that they are about 24 ft long.
If the total weight exceeds the load limit of the truss then the truss is compromised.
All weight hanging from the truss has to be added to the existing dead load.
It is vital to observe the weight rating and make sure that you comply with it at all times.
Spacing between each beam is 14 4.
I put the floor in about twelve years ago and can t remember.
I m guessing you don t have the plans and don t know what live load the attic was designed for.
An uninhabitable attic not designed for storage can handle a 10 pounds per square foot live load.
Size of the beams supporting attic floor.
In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches.
That means you could lay a 2 x 4 ft.
Length of the beams.
Of stuff on it.