ENGINEER LETTER J0417-1714
Comtech, Inc - Fayetteville.
December 31, 2017.My license renewal date for the state of North Carolina is
North Carolina COA: C-0844
Lumber design values are in accordance with ANSI/TPI 1 section 6.3
These truss designs rely on lumber values established by others.
Pages or sheets covered by this seal:
Weaver/Lot 26 Pittman Crossing/Harnett
Gilbert, Eric
The truss drawing(s) referenced below have been prepared by Truss Engineering Co. under my direct supervision
based on the parameters provided by
Re:
thruE10754506E10754506
IMPORTANT NOTE: The seal on these truss component designs is a certification that the engineer named is licensed
in the jurisdictions(s) identified and that the designs comply with ANSI/TPI 1. These designs are based upon parameters
shown (e.g., loads, supports, dimensions, shapes and design codes), which were given to Trenco. Any project specific
information included is for Trenco’s customer’s file reference purpose only, and was not taken into account in the preparation
of these designs. Trenco has not independently verified the applicability of the design parameters or the designs for any
particular building. Before use, the building designer should verify applicability of the design parameters and properly
incorporate these designs into the overall building design per ANSI/TPI 1, Chapter 2.
818 Soundside Rd
Edenton, NC 27932
Trenco
July 19,2017
Job
J0417-1714
Truss
A4A
Truss Type
PIGGYBACK BASE
Qty
5
Ply
1
Weaver/Lot 26 Pittman Crossing/Harnett
Job Reference (optional)
E10754506
8.030 s Jan 23 2017 MiTek Industries, Inc. Wed Jul 19 09:43:43 2017 Page 1 Comtech, Inc., Fayetteville, NC 28309
ID:Jh9ByfjRPPU?mMRDxzGWXKyZ53p-hvjBcR3d_MKBpHJqTuLdWpt3W1FoYbfEpfOfp7ywXvU
Scale = 1:108.1
1
2
3
4
5 6 7
8
9
10
11
20 19 18 17 16 15 14 13 122122
4x6
6x6 6x6
4x6
6x12
8x12
4x4
2x4 5x8
4x8
5x8
4x4
2x4 4x6
4x6
5x8 8x8
5x8
5x8
5x8
10-10-8
10-10-8
21-9-0
10-10-8
29-6-0
7-9-0
37-2-4
7-8-4
37-3-0
0-0-12
48-1-8
10-10-8
59-0-0
10-10-8
-0-10-8
0-10-8
10-10-8
10-10-8
21-9-0
10-10-8
29-6-0
7-9-0
37-3-0
7-9-0
48-1-8
10-10-8
59-0-0
10-10-8
59-10-8
0-10-8
0-8-30-4-411-6-110-8-30-4-40-9-411-6-116.00 12
Plate Offsets (X,Y)-- [2:0-1-3,1-5-3], [2:1-3-7,0-1-14], [7:0-3-0,0-3-8], [14:0-2-8,0-3-4], [15:0-4-0,0-3-8], [17:0-2-3,0-1-2], [18:0-2-10,0-0-12]
LOADING (psf)
TCLL
TCDL
BCLL
BCDL
20.0
10.0
0.0 *
10.0
SPACING-
Plate Grip DOL
Lumber DOL
Rep Stress Incr
Code
2-0-0
1.15
1.15
YES
IRC2009/TPI2007
CSI.
TC
BC
WB
Matrix-S
0.69
0.65
0.97
DEFL.
Vert(LL)
Vert(TL)
Horz(TL)
Wind(LL)
in
-0.19
-0.48
0.13
0.16
(loc)
2-19
2-19
14
2-19
l/defl
>999
>931
n/a
>999
L/d
360
240
n/a
240
PLATES
MT20
Weight: 468 lb FT = 20%
GRIP
244/190
LUMBER-
TOP CHORD 2x6 SP No.1
BOT CHORD 2x10 SP No.1 *Except*
10-13: 2x6 SP No.1, 13-15,2-17: 2x6 SP 2400F 2.0E
WEBS 2x4 SP No.3 *Except*
6-14: 2x4 SP 2400F 2.0E
BRACING-
TOP CHORD Structural wood sheathing directly applied or 4-4-7 oc purlins, except
2-0-0 oc purlins (6-0-0 max.): 5-7.
BOT CHORD Rigid ceiling directly applied or 6-0-0 oc bracing.
WEBS 1 Row at midpt 5-16, 6-16, 6-14, 7-14, 9-14
2 Rows at 1/3 pts 3-16
MiTek recommends that Stabilizers and required cross bracing
be installed during truss erection, in accordance with Stabilizer
Installation guide.
REACTIONS.(lb/size)2=1200/0-3-8, 14=4024/0-3-8, 10=158/0-3-8
Max Horz 2=169(LC 7)
Max Uplift 2=-204(LC 7), 14=-254(LC 7), 10=-236(LC 11)
Max Grav 2=1245(LC 11), 14=4024(LC 1), 10=363(LC 12)
FORCES.(lb) - Max. Comp./Max. Ten. - All forces 250 (lb) or less except when shown.
TOP CHORD 2-3=-2265/546, 3-5=-919/332, 5-6=-670/377, 6-7=-75/1457, 7-9=-227/1736,
9-10=-219/969
BOT CHORD 2-19=-345/1940, 16-19=-336/1948, 15-16=-259/280, 14-15=-263/279, 12-14=-803/209,
10-12=-803/209
WEBS 3-19=0/632, 3-16=-1416/503, 6-16=-269/1204, 6-15=0/482, 6-14=-2378/529,
7-14=-1217/372, 9-14=-1126/453, 9-12=0/484
NOTES-
1) Unbalanced roof live loads have been considered for this design.
2) Wind: ASCE 7-05; 110mph; TCDL=6.0psf; BCDL=6.0psf; h=15ft; Cat. II; Exp C; enclosed; MWFRS (low-rise) and C-C Interior(1)
zone;C-C for members and forces & MWFRS for reactions shown; Lumber DOL=1.60 plate grip DOL=1.60
3) Provide adequate drainage to prevent water ponding.
4) This truss has been designed for a 10.0 psf bottom chord live load nonconcurrent with any other live loads.
5) * This truss has been designed for a live load of 20.0psf on the bottom chord in all areas with a clearance greater than 6-0-0
between the bottom chord and any other members, with BCDL = 10.0psf.
6) Provide mechanical connection (by others) of truss to bearing plate capable of withstanding 100 lb uplift at joint(s) except (jt=lb)
2=204, 14=254, 10=236.
7) See Standard Industry Piggyback Truss Connection Detail for Connection to base truss as applicable, or consult qualified building
designer.
8) Graphical purlin representation does not depict the size or the orientation of the purlin along the top and/or bottom chord.
APPLY 2 X 6 X 4’ SPF/DF/SP NO.2 SCAB(S) TO EACH FACE OF TRUSS CENTERED
ON DAMAGE/SPLICE. ATTACH WITH (0.131" X 3") NAILS PER THE FOLLOWING NAIL
SCHEDULE: 2 x 6 - 3 ROWS: SPACED @ 4" O.C. STAGGER NAIL SPACING FROM
FRONT FACE AND BACK FACE FOR A NET 2" O.C SPACING IN THE TRUSS. USE 2" MEMBER END DISTANCE.
REPAIR: PLATES ARE DAMAGED
AT JOINT(S) { 13 }.
Design valid for use only with MiTekfi connectors. This design is based only upon parameters shown, and is for an individual building component, not
a truss system. Before use, the building designer must verify the applicability of design parameters and properly incorporate this design into the overall
building design. Bracing indicated is to prevent buckling of individual truss web and/or chord members only. Additional temporary and permanent bracing
is always required for stability and to prevent collapse with possible personal injury and property damage. For general guidance regarding the
fabrication, storage, delivery, erection and bracing of trusses and truss systems, see ANSI/TPI1 Quality Criteria, DSB-89 and BCSI Building Componentavailable from Truss Plate Institute, 218 N. Lee Street, Suite 312, Alexandria, VA 22314.Safety Information
WARNING - Verify design parameters and READ NOTES ON THIS AND INCLUDED MITEK REFERENCE PAGE MII-7473 rev. 10/03/2015 BEFORE USE.
818 Soundside Road
Edenton, NC 27932
July 19,2017
edge of truss.from outside"16/1-0PRODUCT CODE APPROVALSJOINTS ARE GENERALLY NUMBERED/LETTERED CLOCKWISEAROUND THE TRUSS STARTING AT THE JOINT FARTHEST TOTHE LEFT.CHORDS AND WEBS ARE IDENTIFIED BY END JOINTNUMBERS/LETTERS.W
4
-
6
W3-6W3-
7
W2-7W1-7C1-8
C5-6C6-7C7-8C4-5 C3-4C2-3C1-2TOP CHORD
TOP CHORD
87654321BOTTOM CHORDSTOP CHORDSBEARINGLATERAL BRACING LOCATIONIndicates location where bearings(supports) occur. Icons vary butreaction section indicates jointnumber where bearings occur.Min size shown is for crushing only.Indicated by symbol shown and/orby text in the bracing section of theoutput. Use T or I bracingif indicated.The first dimension is the plate width measured perpendicular to slots. Second dimension isthe length parallel to slots.4 x 4PLATE SIZEThis symbol indicates the required direction of slots inconnector plates."16/1For 4 x 2 orientation, locateplates 0- Center plate on joint unless x, yoffsets are indicated.Dimensions are in ft-in-sixteenths.Apply plates to both sides of trussand fully embed teeth.1"4/3PLATE LOCATION AND ORIENTATIONSymbolsNumbering System1. Additional stability bracing for truss system, e.g. diagonal or X-bracing, is always required. See BCSI.2. Truss bracing must be designed by an engineer. For wide truss spacing, individual lateral braces themselves may require bracing, or alternative Tor I bracing should be considered.3. Never exceed the design loading shown and never stack materials on inadequately braced trusses.4. Provide copies of this truss design to the building designer, erection supervisor, property owner and all other interested parties.5. Cut members to bear tightly against each other.6. Place plates on each face of truss at each joint and embed fully. Knots and wane at joint locations are regulated by ANSI/TPI 1.7. Design assumes trusses will be suitably protected from the environment in accord with ANSI/TPI 1.8. Unless otherwise noted, moisture content of lumber shall not exceed 19% at time of fabrication.9. Unless expressly noted, this design is not applicable for use with fire retardant, preservative treated, or green lumber.10. Camber is a non-structural consideration and is the responsibility of truss fabricator. General practice is to camber for dead load deflection.11. Plate type, size, orientation and location dimensions indicated are minimum plating requirements.12. Lumber used shall be of the species and size, and in all respects, equal to or better than that specified.13. Top chords must be sheathed or purlins provided at spacing indicated on design.14. Bottom chords require lateral bracing at 10 ft. spacing, or less, if no ceiling is installed, unless otherwise noted.15. Connections not shown are the responsibility of others.16. Do not cut or alter truss member or plate without prior approval of an engineer.17. Install and load vertically unless indicated otherwise.18. Use of green or treated lumber may pose unacceptable environmental, health or performance risks. Consult with project engineer before use.19. Review all portions of this design (front, back, words and pictures) before use. Reviewing pictures alone is not sufficient.20. Design assumes manufacture in accordance with ANSI/TPI 1 Quality Criteria.Failure to Follow Could Cause PropertyDamage or Personal InjuryGeneral Safety Notes*Plate location details available in MiTek 20/20software or upon request.Industry Standards:6-4-8dimensions shown in ft-in-sixteenths (Drawings not to scale)' 2012 MiTekfi All Rights ReservedMiTek Engineering Reference Sheet: MII-7473 rev. 10/03/2015WEBSedge of truss.from outside"16/1-0ICC-ES Reports:ESR-1311, ESR-1352, ESR1988ER-3907, ESR-2362, ESR-1397, ESR-3282JOINTS ARE GENERALLY NUMBERED/LETTERED CLOCKWISEAROUND THE TRUSS STARTING AT THE JOINT FARTHEST TOTHE LEFT.CHORDS AND WEBS ARE IDENTIFIED BY END JOINTNUMBERS/LETTERS.W
4
-
6
W3-6W3-
7
W2-7W1-7C1-8
C5-6C6-7C7-8C4-5 C3-4C2-3C1-2TOP CHORD
TOP CHORD
87654321BOTTOM CHORDSTOP CHORDSBEARINGIndicates location where bearings(supports) occur. Icons vary butreaction section indicates jointnumber where bearings occur.4 x 4PLATE SIZEThis symbol indicates the required direction of slots inconnector plates."16/1For 4 x 2 orientation, locateplates 0- 1"4/3PLATE LOCATION AND ORIENTATIONSymbolsNumbering SystemGeneral Safety Notes*Plate location details available in MiTek 20/20software or upon request.Industry Standards:ANSI/TPI1: National Design Specification for Metal Plate Connected Wood Truss Construction.DSB-89: Design Standard for Bracing.BCSI: Building Component Safety Information, Guide to Good Practice for Handling, Installing & Bracing of Metal Plate Connected Wood Trusses.6-4-8dimensions shown in ft-in-sixteenthsWEBSTrusses are designed for wind loads in the plane of the truss unless otherwise shown.Lumber design values are in accordance with ANSI/TPI 1 section 6.3 These truss designs rely on lumber values established by others.