Bottom Chord Attic

Room in attic trusses are professionally designed with state of the art computer programs.

Bottom chord attic.

The dead load on the bottom chord of a truss varies with the weight of materials attached to it such as drywall on. Room in attic trusses or more commonly attic trusses allow for living spaces within a truss. In some cases a live load can be applied to a bottom chord either for storage purposes or if there will be movement within the truss such is the case in an attic truss. C determine the total load and proper load duration.

G n t e c h n i c a l i n f o r m a a t i o n. The bottom chord is increased and loaded for live loads similar to floor systems in residential spaces. A the top and bottom chord dead load. The bottom chord therefore carries combined stress of both tension and bending of the truss.

About the bottom chord. I remember on one house he told me that you never ever ever ever cut a truss. If the roof slope is steeper than 9 inches in 12 inches of run it doesn t take much width to end up with a nice room 12 feet wide with an 8 foot ceiling. Residential room in attic trusses are an inexpensive way to add extra living or storage space to your home or garage while also increasing the value of your property.

If the bottom chord of a roof truss functions as a floor joist such as in an attic room it carries a live load that also varies by use but a typical live floor load for a residential space is about 40 pounds per square foot. Cutting the bottom chord of an attic truss i worked for an old school new england carpenter for a couple years when i was 15 16 years old. In floor truss applications 2x4 or 2x3 material is typically used with the wider portion of the board resting on the bearing or what is known as a 4x2 configuration. D sketch the loading diagram and calculate the reactions.

Using ecojoist as the bottom chord increases the overall floor zone depth due to the requirement to rotate the top and bottom chords of the joist to match that of the remaining attic timbers. Attic trusses have a rectangular shape inside each truss. With the webs taken into account the overall depth of the bottom chord increases from 222mm to 353mm. Room size will vary depending on the overall size and slope also referred to as pitch of the trusses.

The lumber components are. Look at this photo of the space created by attic trusses at my home. B the top chord live include snow load as a live load and bottom chord live load. Attic trusses are popular over garages or anywhere people want to increase living or storage space without adding another floor to their structure.

I have this above my own garage.