Bottom Chord Attic

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.

Bottom chord attic.

A triangle is the simplest form of a truss and the bottom chord is the base piece. 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. The bottom chord is increased and loaded for live loads similar to floor systems in residential spaces. 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.

I have this above my own garage. About the bottom chord. The horizontal beam of the triangle of a bottom chord is used in this simple triangle truss construction. Attic trusses have a rectangular shape inside each truss.

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. I remember on one house he told me that you never ever ever ever cut a truss. Attic trusses are popular over garages or anywhere people want to increase living or storage space without adding another floor to their structure. 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.

The attic space is considered uninhabitable but will be used for storage. 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. Room in attic trusses or more commonly attic trusses allow for living spaces within a truss. A the top and bottom chord dead load.

With the webs taken into account the overall depth of the bottom chord increases from 222mm to 353mm. The dead load on the bottom chord of a truss varies with the weight of materials attached to it such as drywall on. The bottom chord therefore carries combined stress of both tension and bending of the truss. The lumber components are.

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. Look at this photo of the space created by attic trusses at my home. D sketch the loading diagram and calculate the reactions. B the top chord live include snow load as a live load and bottom chord live load.

G n t e c h n i c a l i n f o r m a a t i o n.