Trus joist tji joists are a key part of making a high performance floor.
Floor truss weight calculator.
This free online truss and roof calculator generates the axial forces and reactions of completely customisable 2d truss structures.
Floor trusses have built in openings which can be used to install hvac ductwork plumbing lines and electrical wiring.
Tji joists are lightweight and come in long lengths which makes them faster and easier to install than traditional framing and saves you both.
Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.
An 18 inch deep truss 22 feet long is used in the floor of an office project.
The floor assembly consists of linoleum tile over a hydronic floor heating system with 1 inch light weight concrete assume hydronic heating system weight of the lightweight concrete it replaces and inch plywood subflooring.
Spacing of trusses are center to center in inches.
Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.
To use the joist span calculator below first select the species of lumber you will use for your construction project from the drop down list.
The truss manufacturer will calculate final loads metal plate sizing member sizing webs and chord deflections based on local climatic and or seismic conditions.
We have engineered this calculator to provide spans which will produce a solid built house with no bounce in the floors or any swags in the ceiling.
With an evenly distributed live load of 30 psf which the tables show the floor is able to support the total weight on the floor would be about 3 360 pounds.
Increasing the total weight on the floor to 4 480 pounds however results in a live load of 40 psf which is beyond the floor s load capacity.
This rafter truss calculator has a range of applications including being used as a wood truss calculator roof truss calculator roof rafter calculator scissor truss calculator or for roof framing.
Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.
R802 10 2 and designed according to the minimum requirements of ansi tpi.
Floor trusses are going to run around 4 40 per lineal foot spaced 2 on center this makes the cost per square foot for the joists at 2 20.
This also reduces the need and cost for extra bearing posts beams and footings.
The highest is a fully loaded floor 70 pounds per.
The lowest is a plain ceiling joist with no storage 10 pounds per square foot.
Maximum deflection is limited by l 360 or l 480 under live load.
For a floor span of over 24 trusses are certainly the way to go.
Floor trusses can span farther between bearing points than i joists allowing for larger open rooms.
The dimensional stability of tji joists help them resist warping twisting and shrinking that can lead to squeaky floors.
