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05425 Cold-Formed Steel Trusses

Roof Truss Spans

Every TrusSteel roof truss is a custom design based upon the unique load, span, bearing, use, and codecriteria of a particular project. The load / span tables shown below demonstrate only a tiny subset of thepossible combinations available with TrusSteel CFS roof trusses.

Typical Roof Truss Design Spans

General Notes:1) Spans shown in charts are in feet.2) Loads shown above are outlined as Top Chord Live Load (TCLL), Top Chord Dead

Load (TCDL), and Bottom Chord Dead Load (BCDL).3) Top chord designed assuming structural sheathing offers lateral restraint.4) Bottom chords designed assuming lateral restraint spaced at 24 inches on center.5) Deflection l imits: Live Load - L/360 Total Load - L /2406) Trusses designed with ASCE7-98 wind

- Wind speed shown in charts- Exposure C

- Building category II- Truss bearing elevation is 80- No topographic effect from escarpment or hill taken into account- Enclosed building

7) Some trusses above may require a piggyback truss due to excessive truss height.8) 80+ as shown above means that a span in excess of 800 is possible. Refer to TrusSteel

Technical Bulletin TB991102 and a TrusSteel engineer regarding these spans.9) Scissor trusses designed with a bottom chord pitch equal to half of the top chord pitch

i.e. a 6/12 top chord pitch scissor truss will havea 3/12 bottom chord pitch.

10) Designs may include multiple gauges for top and bottom chords as determined by thedesigner using Alpines VIEW engineering software. Maximum chord gauges are 18gauge for the TSC2.75 chord and 16 gauge for the TSC4.00 chord.

11) The truss web pattern used in the design is to be determined by the designer usingAlpines VIEW engineering software.

Load 1 Load 2 Load 3 Load 4 20, 10, 10 psf 30, 10, 10 psf 20, 10, 10 psf 30, 10, 10 psf 90 mph wind 90 mph wind 140 mph wind 140 mph wind

Ch ord Si ze TSC2.75 TSC4.00 TSC2.75 TSC4.00 TSC2.75 TSC4.00 TSC2.75 TSC4.00 O.C. Truss Spans 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4

Common Pitch 3/12 48 26 80+ 62 38 20 80+ 52 48 26 80+ 62 38 20 80+ 52 4/12 56 31 80+ 77 45 23 80+ 60 56 31 80+ 77 45 23 80+ 60 5/12 62 33 80+ 80+ 52 27 80+ 65 62 33 80+ 80+ 52 27 80+ 65 6/12 64 36 80+ 80+ 55 27 80+ 75 64 33 80+ 80+ 55 27 80+ 75 7/12 64 37 80+ 80+ 56 28 80+ 80+ 64 35 80+ 80+ 56 28 80+ 80+ 8/12 64 38 80+ 80+ 58 30 80+ 80+ 64 37 80+ 80+ 58 30 80+ 80+

Scissor Pitch 3/12 27 15 57 32 22 13 48 26 27 15 57 32 22 13 48 26 4/12 34 19 69 43 28 15 65 36 34 19 69 43 28 15 65 36 5/12 40 22 77 51 33 18 69 42 40 22 77 51 33 18 69 42 6/12 46 25 79 57 38 20 72 47 46 25 79 57 38 20 72 47 7/12 50 28 80+ 60 44 23 73 53 50 28 80+ 60 44 23 73 53 8/12 53 31 80+ 61 49 25 74 55 53 31 80+ 61 49 25 74 55

Mono Pitch 3/12 36 25 80+ 60 32 21 80+ 50 36 25 80+ 60 32 21 80+ 50 4/12 34 26 80+ 64 32 23 80+ 52 34 26 80+ 64 32 23 80+ 52 5/12 34 26 80+ 64 32 23 80+ 52 34 26 80+ 64 32 23 80+ 52 6/12 34 26 80+ 64 32 23 80+ 52 34 26 80+ 64 32 23 80+ 52 7/12 34 28 80+ 64 33 23 80+ 52 34 28 80+ 64 33 23 80+ 52 8/12 34 28 80+ 64 33 23 80+ 52 34 28 80+ 64 33 23 80+ 52

Flat Depth 12 22 18 24 20 19 16 24 20 22 18 24 20 19 16 24 20 18 30 23 36 28 29 21 33 27 30 23 36 28 29 21 33 27 24 39 28 45 35 35 25 42 32 39 28 45 35 35 25 42 32 36 49 35 64 46 44 28 59 41 49 35 64 46 44 28 59 4148 58 36 75 55 51 29 70 49 58 36 75 55 51 29 70 49 60 65 36 80+ 62 57 29 80 55 65 36 80+ 62 57 29 80 55 72 66 33 80+ 68 51 25 80+ 61 66 33 80+ 68 51 25 80+ 61

ALPINE

Division o f Alpine Enginee red Prod ucts, Inc.

TrusSteel Division of Alpine Engineered Products, Inc.3208 Fisher Court Arlington, TX 76001 888-565-9181 Fax: 817-483-1521

0211 5K

7/28/2019 Truss Span Flyer

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05425 Cold-Formed Steel Trusses

Floor Truss Spans

Every TrusSteel floor truss is a custom design based upon the unique load, span, bearing, use, and codecriteria of a particular project. The load / span tables shown below demonstrate only a tiny subset of thepossible 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 TSC2.75 TSC4.00 TSC2.75 TSC4.00 O.C. Truss Spacing 12 16 19.2 24 12 16 19.2 24 12 16 19.2 24 12 16 19.2 24

Depth12 22 20 18 17 24 24 22 20 17 15 14 13 21 18 18 16 14 25 22 21 19 28 27 25 23 19 17 16 15 24 21 20 18 16 28 25 23 21 32 31 28 25 22 19 18 17 27 24 22 20 18 31 27 26 23 36 34 31 29 24 21 20 18 29 26 24 22 20 33 30 28 26 40 37 34 31 26 23 22 20 32 29 27 24 22 36 32 30 27 44 39 37 34 28 25 23 22 34 31 29 26

24 38 34 32 29 47 42 39 36 30 27 25 23 37 33 31 28

Load 3125, 10, 5 psf

Chord Size TSC2.75 TSC4.00 O.C. Truss Spacing 12 16 19.2 24 12 16 19.2 24

Depth12 14 13 12 11 17 16 14 13 14 16 14 14 13 20 18 17 15 16 18 16 15 14 22 20 19 17 18 20 18 17 15 25 22 21 19 20 22 19 18 16 27 24 22 2122 23 21 20 18 29 26 24 22 24 25 22 21 18 31 28 26 24

General Notes:1) Spans Shown in charts are in feet.2) Loads shown above are outlined as Top Chord Live

Load (TCLL), Top Chord Dead Load (TCDL), andBottom Chord Dead Load (BCDL).

3) Top and bottom chords designed assumingstructural sheathing offers lateral restraint.

4) Deflection limits: Live Load - L/480Total Load - L/360

5) Chases are to be located in center of span.Maximum chase width allowed is 24 inches.

6) Refer to TrusSteel Technical Bulletin TB971125 forTrusSteel floor truss design criteria.

7) Designs may include multiple gauges for top andbottom chords as determined by the designer usingAlpines VIEW engineering software. Maximumchord gauges are 18 gauge for the TSC2.75 chordand 16 gauge for the TSC4.00 chord.

Typical Duct Opening Sizes for 2.75 Chord Size Steel Floor TrussDepth Panel Size A B C D E F

12 60.00 6.25 6.00 14.00 5.00 20.00 4.00 14 60.00 8.25 7.50 17.00 5.75 22.00 4.75 16 60.00 10.25 8.75 14.00 8.00 27.00 4.75 18 60.00 12.25 10.00 14.50 9.50 26.00 6.00 20 60.00 14.25 11.00 14.50 11.00 26.00 7.25 22 60.00 15.75 12.00 15.00 12.25 30.00 6.75

24 60.00 17.25 12.75 16.00 13.25 32.00 7.00

Typical Duct Opening Sizes for 4.00 Chord Size Floor TrussDepth Panel Size A B C D E F

12 60.00 3.75 3.75 14.00 3.75 20.00 2.75 14 60.00 5.75 5.75 17.00 4.50 22.00 3.50 16 60.00 7.75 7.75 14.00 6.75 27.00 3.50 18 60.00 9.75 9.00 14.50 8.25 26.00 4.75 20 60.00 11.75 10.00 14.50 9.75 26.00 6.00 22 60.00 13.75 11.00 15.00 11.00 30.00 5.50

D

CE

B

F

A

Panel Size

Depth

Allowable Duct Sizes

ALPINE

Division o f Alpine Enginee red Prod ucts, Inc.

TrusSteel Division of Alpine Engineered Products, Inc.3208 Fisher Court Arlington, TX 76001 888-565-9181 Fax: 817-483-1521

All panel and duct opening size dimensions shown above are in inches.