HomeMy WebLinkAboutROOF BRACING PLANBRACING NOTES:
revisions
no. date
I. BRACING SHOWN OOE5 NOT INCLUDE TEMPORARY BRACING
REQUIRED FOR THE ERECTION AND INSTALLATION OF TRU55E5
PRIOR TO THE INSTALLATION OF PERMANENT CRO55 BRACING
AND WEB LATERAL BRACING REQUIREMENTS. TEMPORARY
BRACING 15 THE RE5PON51BILITY OF THE TRU55 INSTALLER
AND SHOULD REMAIN IN PLACE AS LONG AS NECESSARY FOR THE
SAFE AND ACCEPTABLE I N5TALLATION OF THE ROOF OR FLOOR.
(REF: BC51).
2. PERMANENT WEB LATERAL BRACING IS TO BE INSTALLED AS
SHOWN ON THE INDIVIDUAL TRU55 DRAWINGS (WEB LATERAL
BRACING 15 NOT 5HOWN ON TH15 5HEET). PERMANENT WEB
LATERAL BRACING 15 TO BE RE5TRAINEO TO PREVENT LATERAL
MOVEMENT BY SOLID ANCHORAGE TO END WALL5, OR BY
PERMANENT DIAGONAL BRACING (NOT SHOWN) IN THE PLANE OF
THE WEB MEMBER AT INTERVALS NOT TO EXCEED 20 FEET ALONG
CON7INUOU5 WEB BRACE. (REF: BCSI).
3. PERMANENT DIAGONAL BRACING AS SHOWN ON THI5 SHEET DOE5
NOT INCLUDE BRACING REQUIRED FOR GABLE END 5TUD5 OR
BOTTOM CHORD OF GABLE END AT WALL. REFER TO STANDARD
GABLE END DETAIL FOR BRACING REQUIREMENTS.
4. ALL TOP CHORDS ARE ASSUMED TO BE 5HEATHED, AND ALL
BOTTOM CHOR05 BRACED BY A RIGID CEILING 5Y57EM. REFER
TO INDIVIDUAL 7RU55 ORAWING5 FOR BRACING REQUIREMENT5
OF NON -SHEATHED TOP CHORDS AND UNSUPPORTED BOTTOM
CHORDS.
5. REFER TO TPI / WCTA BC51: COMMENTARY AND
RECOMMENDATIONS FOR HANDLING, INSTALLATION AND BRACING
METAL PLATE CONNECTED WOOD TRUSSES° APPENDIX G, FOR
RECOMMENDED 5EQUENCE OF IN5TALLING BRACING COMPONEN75.
6. THE STRUCTURAL ADEQUACY OF THE INDIVIDUAL TRU55 DESIGNS
TO WITHSTAND GRAVITY AND WIND LOADINGS AS WELL AS
GIRDER GONNEG7ION5 AND LOADS ARE THE RE5PON5151ITY OF
THE TRU35 DE5I6NER. ANCHORAGE OF THE TRU55E5 AND
GIRDERS TO THE SUPPORTING STRUCTURE TO WITHSTAND WIND
UPLIFT 15 THE RE5PON51BILITY OF THE PROJECT ENGINEER OR
ARCHITECT.
7. THE BRACING FOR THE ROOF SYSTEM IS DESIGNED FOR BOTH
P051TIVE $ NEGATIVE PRESSURE AND MEET5 THE
REQUIREMENTS OF 2020 FBG.
BRACING LEGEND:
PERMANENT 2x4 DIAGONAL BRACE RESTRAINT IN THE
PLANE OF THE NEAREST WEB MEMBER AT 20'-0"
INTERVALS AT APPROXIMATELY 45 DEGREE ANGLE.
FASTEN TO OPPOSITE 5IDE OF WEB WITH 3-I6d TOENAILS
AND TO LATERAL BRACE WITH (5) IOd NAILS EACH
INTERSECTION. (REF: 5051).
HORIZONTAL BRIDGING WITH A MINIMUM 2x6 5TRONGBACK
AT 6-0" 0/0. FASTEN TO EACH TRU55 WITH 3-I0d NAILS
AND ATTACH TO WALL5 OR OTHER RIGID POINT AT EACH
END (REF: BC510. PROVIDE OVERLAP OF AT LEAST (5)
TRUSSES (FLOOR ONLY).
PERMANENT 2x4xGONT. LATERAL BRACING IN THE PLANE
OF THE STRUCTURAL BOTTOM CHORD OF THE TRUSSES AT
6-0" 0/0. FASTEN WITH 2-I0d NAILS IN EACH TRU55.
PROVIDE OVERLAP OF AT LEAST (2) TRUSSES (ROOF
ONLY).
ZONES I $ 2
(5EE DIAPHRAGM SCHEDULE)
ZONE 3
(SEE DIAPHRAGM SCHEDULE)
BRACING DETAILS:
5HEATHING
COMPRESSION WEB
SLOPING OR VERTICAL
GONTI NUOU5 PERMANENT
LATERAL BRACING (G.L.B)
PERMANENT DIAGONAL
BRACE NAILED TO OPP.
5I0E OF WEB PREVENTS
LATERAL MOVEMENT AND
SHOULD BE REPEATED
AT APPROX. 20 FOOT
INTERVAL-5
CEILING
FIGURE 36: PERMANENT DIAGONAL
BRACING IN THE PLANE OF THE WEB MEMBERS
FIGURE 37: PERMANENT BRACING IN THE
PLANE OF THE WEB5 FOR PITCHED TRU55E5
HORIZONTAL BRIDGING WITH A MINIMUM 2x6
5TRONGBACK CONNECTION TO EACH TRUSS WITH
3-I0d NAILS AND ATTACHED TO WALL5 OR OTHER
RIGID POINT AT EACH END (REF: 6051).
PROVIDE OVERLAP OF AT LEAST (5) TRUSSES
(FLOORS ONLY).
SEE PLAN
FIGURE 56: PERMANENT BRACING IN THE PLANE
OF THE XE55 FOR PARALLEL CHORD TRU55E5
LATERAL BRACE
PERMANENT WEB
DIAGONAL CRO53
BRACING
GROUP OF WOOD
TRU55E5
!WEB MEMBERS)
LATERAL BRACE
FIGURE 311: PERMANENT BRACING
IN THE PLANE OF THE WEBS
a: EDGE STRIP DEFINED A5 THE LE55ER OF 10%
OF LEAST HORIZONTAL OIMEN51ON OF BUILDING
OR 40% OF HEIGHT H BUT NOT LE55 THAN 4% OF
LEAST HORIZONTAL 0IMEN510N OF BUILDING AND
AT LEAST 3 FT.
ROOF ZONE PRE55URE5:
ZONE I = 61.q P5F.
ZONE 2r= 80.'i P5F.
ZONE 2a OH= II'I.q P5F. _
ZONE 3 OH= 115.5 P5F.
NOTE: SEE DIAPHRAGM
50HEDULE FOR ROOF
ZONE NAILING
REQUIREMENT5.
N
OTO
311# MAX UPLIFT PER TRU55
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designed PAR
d rawn PAR
checked 55
date 11/25/21
scale 1/4" = 1'-0" U.N.O.
job no. 21-0041 . LOW
QLA
QUANTUM ENGINEERING ASSOCIATES INC.
•
Strucdui-al Engineering & Cost Segregation
6415 LAKE WORTH ROAD
SUITE 105
GREENACRES, FLORIDA 33463
W W W.QEASSOCIATES.COM
M"S-T Digitally signed
by Shawn
Stambaugh
Date.
This item has been elemonically
signeda°a —dby Shaw°say.
b-h. ve.,.Isarehow���i„ya
git2021.11.29
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Shawn M. Stambaugh, PE
FL. LIC. 61850 — C.A. 26210
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ROOF
BRACING
PLAN
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