Attic Storage Load Limit

Dead load of first floor ceiling not plastered 10 lbs.

Attic storage load limit.

Storage space dead load of partitions 20 lbs. Access to attic storage. That means you could lay a 2 x 4 ft. Of floor area dead load on second floor 20 lbs.

Of floor area dead load of partitions 20 lbs. Is a safe estimate. Live load on second floor local requirements. Dead load of attic floor when floored 20 lbs.

2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes. Design live loads will vary based on a number of factors but at a minimum 10 psf live load for attics without storage 20 psf live load with limited storage and 30 psf for habitable attics. To simplify you can place 20 pounds of dead load per square foot on your subfloor as long it s supported mid span. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of other elements in the load path.

Of stuff on it. Dead load of first floor ceiling plastered 20 lbs. If the attic has the potential to become a regular living space talk with a contractor about adding a fixed stairway. 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.

Scrap of plywood over the chords and set about 40 lbs.