parallel chord floor truss span chart

1 b t c. Bottom Chord Dead Load 5 psf.

Roof Truss Design Roof Trusses Wood Truss

Top Chord Dead Load 10 psf.

. Maximum 30 2 6 top chord panel length on flat-wise trusses. Spacing of trusses are center to center in inches. Chord size and web configuration are determined by span load and spacing.

The parallel chord or flat truss gets its name from having parallel top and bottom chords. Sloping Parallel Chords Howe Configuration Three Piece Long Span Field Connected-- Spans 60 to 80 Long Span Sissors-- Spans 45 to 70 Large Long Span Trusses require special handling and erection specifications. Spacing of trusses are center to center in inches.

TCLL Top chord Floor Live Load 2. The installation of wood trusses requires the same high degree of safety awareness as the installation of any other structural material. The first longer span truss will face lateral wind loads in the area where it is not shielded by the smaller span trusses.

Floor Trusses Maximum span to depth ratio of 20 for example a 14 deep truss should not exceed a span of 23 4. LD Ratio The ratio of the truss span L to its depth D both dimensions in inches. Other floor and roof loading conditions a variety of species and other lumber grades are available.

Top and Bottom Chords braced by structural sheathing 6. Connected at right angles to a chord or web member of a truss. A transition gable end truss occurs when a run of smaller span trusses leads up to parallel longer span trusses.

The chord size and web configuration are determined by span load and spacing. Connected at right angles to a chord or web member of a truss. Level Return A lumber filler placed horizontally from the end of an overhang to the outside wall to form a soffit.

Top Chord Dead Load 10 psf. Trusses must be designed for any special loading such as concentrated loads. 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.

Level ReturnA lumber filler placed horizontally from the end of an overhang to the outside wall to form a soffit. This type is often used for floor construction but can also be used in roof applications. To Floor Truss Span Section AA - Floor Truss Jacks Floor Joist Scab Cantilever Floor Cantilevered Perpendicular and Parallel to Floor Truss Span Strongback Lateral Supports 24 Max.

Center Line Chase 24 max. Live Load L480 Total Load L360 5. The depth of the truss was 24.

I created a dedicated air space under the roof deck using fiberboard sheathing had wind wash barriers at the eaves. Using floor trusses allows you to utilize 8-foot basement walls as the ductwork is installed within the openings of the floor truss. Trusses must be designed for any special loading such as concentrated loads.

Additionally having the mechanicals and ductwork hidden within the web openings of the floor truss allows for the easy installation of drywall to the bottom chord of the floor truss to finish off a ceiling. Floor Parallel Chord Special Tray Vault Dual Slope Cathedral Studio Mono Scissor Common Bobtail. 1 b t c.

Spans shown are in feet 4. Openings are to be located in the center of the span max opening width is 24 inches 7. An inclined or horizontal member that establishes the top of a truss forming the roof lines.

Peak Span Top Chord Pitch 12 Bottom Chord Web Heel Splice Web Joint Overhang Top Chord. We then installed 22 of blown insulation. This type is often used for floor construction but can also be used.

Roof Truss Span Tables Alpine Engineered Products 15 Top Chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 Bottom Chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 212 24 24 33 27 27 37 31 31 43 33 33 46 2512 29 29 39 33 33 45 37 38 52 39 40 55 312 34 34 46 37 39 53 40 44 60 43 46 64 3512 39 39 53 41 44 61 44 50 65 47 52 70. The span capability of light frame trusses is dependent on loads style spacing depth lumber and plate properties. 4x2 FLOOR TRUSS WITH.

Truss Spacing 12 16 192 24 12 16 192 24 12 16 192 24 12 16 192 24 Depth 12 22 20 18 17 24 24 22 20 17 15 14 13 21 18 18 16. Spacing of trusses are center-to-center in inches. LD RatioThe ratio of the truss span L to its depth D both dimensions in inches.

Bottom Chord Dead Load 5 psf. Double Howe KK-- Spans 40 to 60 Modified Fan Triple Fan-- Spans 44 to 60 Triple Fink WWW-- Spans 54 to 80 Triple Howe KKK-- Spans 54 to 80 Double Inverted Lengths 50 to 80 Three Piece Raised Center Bay Lengths 50 to 100 Three Piece Long Span Field Connected-- Spans 60 to 80 Typical Flat Parallel Chord Trusses Stepdown Hip H ip G rde. I used a vaulted parallel chord truss for a studio over a garage.

The pitch was 512 and the span was 22. All truss designs are optimized to provide the most economical configuration for the specific application. Sample spans are given below as guidelines for both floor and roof trusses.

Section A Page 1. Typically roof live load is. The parallel chord or flat truss gets its name from having parallel top and bottom chords.

All truss designs are optimized to provide the most economical configuration for the specific application. Trusses must be designed for any special loading such as concentrated loads. Center Line Chase 24 max.

Possible combinations available with TrusSteel CFS floor trusses. Typical Floor Truss Design Spans Load 1 Load 2 40 10 5 psf 80 10 5 psf Chord Size TSC275 TSC400 TSC275 TSC400 OC. Top Chord Dead Load 10 psf.

Other floor and roof loading conditions a variety of species and other lumber grades are available. Step-down hip trusses the same span as. Minimum duct chase offset from the bearing is ¼ of the truss span.

Live LoadAny temporary applied load to a floor truss chord. The purpose of a parallel chord roof truss is to support other structural elements through its ability to carry a heavier load than other structural trusses. The additional plates and posts that make up the web between the two chords are what provide the extra strength that the parallel chord truss is known for.

Live Load Any temporary applied load to a floor truss chord. TCDL 10 psf and BCDL 5 psf 3. Typically roof live.

In the smaller span area of that same gable it doesnt have continuous support under its bottom chord. Maximum 48 4 top chord panel length on edgewise trusses. Sample Canadian Spans for Parallel Chord Floor Trusses spaced at 400 mm Sample Spans m Depth mm 19 kPa Residential Floor Truss 24 kPa Office Floor Truss.

Center Line Chase 24 max. Bottom Chord Dead Load 5 psf.

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