Is that a towel in there.
Floor trusses hvac chnel.
Incorporating hvac in floor containers requires deeper joists.
Using floor joists as return ducts by panning can cause leakage because negative pressure in the cavity will draw air from the outside into the cavity through the construction joints of the rim area at the end of the joist cavity.
Hvac chases or duct runs may be designed into floor trusses to allow for plumbing and or heating and air conditioning ducts to be installed in the floor.
The increasing challenges of i joist floor systems.
Locating hvac in conditioned spaces within floor containers is often mandated by energy code.
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This reduces the need for interior bearing and provides space for hvac plumbing and electrical systems within the floor panels our custom designed floor truss systems reduce the amount of bounce that can be found in conventionally framed floor joist systems.
This also reduces the need and cost for extra bearing posts beams and footings.
72 5 0 mi ni m u m girder floor truss floor truss jacks a a bearing wall girder floor truss floor truss jacks bearing wall cantilevered floor truss two 2x rim joists 24 max.
Handling 48 or 60 joists and processing them through 300 000 saws.
Hvac chases are typically 24 wide and as tall as the height between the top and bottom chords will allow.
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Floor trusses are able to span farther than dimensional lumber and even i joists.
Increasingly complicated hole patterns.
Roof floor truss manual 7 31.
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Floor trusses can span farther between bearing points than i joists allowing for larger open rooms.
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Steel is also a non renewable resource manufactured with great energy consumption.
Plated floor trusses are very heavy present a handling danger because of sharp plate edges and plates often interfere with the installation of mechanicals.
As we look closer here s what we see in this house.
Hvac chases in floor trusses hvac chase.
Using panned floor joists as an hvac air pathway is highly.
What the installer did here was to screw a piece of sheet metal to the bottom of the joists and attach a duct to it to carry the air back to the hvac system.
In this case it s big enough that there s even a joist running right through the middle.
Still commonly used is the panned floor joist.