There are several reasons for this.
2x4 truss attic storage.
Some roofs are framed with special storage trusses that leave an open central space suitable for storage.
First adding weight to the top of the bottom 2 4 that makes up the truss is a big no no.
I m going to put down some osb in a small 4x8 spanning three bottom chords section of the warren style 2x4 trussed 24 oc attic in my townhome.
This goes for manufactured roof trusses the kind assembled with metal gussets if you have traditional site built roof framing your storage capacity depends on the design of the framing.
Pictures of the attic area and a drawing of what each truss looks like and the reinforcement i am considering are attached.
Thanks for your help.
Finally make sure stored items are securely locked in place.
Its a typical 2x4 truss system.
If the roof structure of your home was designed with prefabricated trusses your attic was definitely not designed for any storage.
From what i ve been reading the trusses are not designed to support storage and i need to get a structural engineer s on site opinion as to what all needs done.
2 215 4 truss attic storage november 10 2018 by zamira leave a comment trussed rafter technical manual ci 2018 wfcm garage roof trusses slubne suknie info attic.
In the third i have provided load bearing capability over 2x4 truss bottom elements otherwise flimsy.
24 on center and from floor to peak is only 3 5.
Unfortunately my home builder had framed out the attic using a common truss system utilizing 2x4 s see attached picture of exact type although my roof is much steeper and no middle non bearing wall below.
Access to attic storage 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.
I was thinking of adding a vertical 3 to 4 foot 2x4 between the rafter angled upper piece of the truss and the base horizontal bottom piece of the truss on each side as shown in the attached diagram.