HomeMy WebLinkAbout025 S.1 - Braced Wall Line - Cottage BROOF SHEET
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Date:mobile #:phone #:Project No.Drawn by:Date:Scale:GENERAL CONTRACTOR:Revised by:
Drafting & Design, IncEG CONSTRUCTION, LLCEUGEN GRAFPO BOX 10906BOZEMAN, MT 59714406-579-8248B24-0328-5Blackmore Cottages - BBON TON AVE.BOZEMAN, MONTANABLACKMORE COTTAGECO. LLC-Allison Subdivision-Master Copy
D. Johnston 15 Oct 21
D. Johnston 20 Apr 24
D. Johnston 24 Aug 21
D. Johnston 25 Aug 21
D. Johnston 04 May 24IMPACTDRAFTING & DESIGN, incwww.impactdrafting.com2024 Brentwood Professional Center1195 Stoneridge Dr., Suite 3DBozeman, MT. 59718406-522-5382All rights reserved. All designs, drawings, ideas,
and written material contained or described herein
are the sole property of IMPACT Drafting & Design
Inc. and as such may not be altered, duplicated,
used or disclosed without written consent from
IMPACT Drafting & Design Inc.scale is correct ifprinted on D-Size paperby IMPACT DraftingNote: IMPACT Drafting & Design Inc. is not responsible for engineering,construction or materials. Individual contractors are responsible for meeting codes.IMPACT
D. Johnston 13 May 24
C. Johnston 15 May 24CONTACT/OWNERA.4 3/8" = 1'Roof
Sheet
scale: 3/8" = 1'
Example of raked gable-end wall
(with scissors gable end frame)
FIGURE B3-42A
bottom
chord
plane
Raked Gable End Frame
The Building Designer may decide to design a
balloon-framed end wall, which eliminates the need for a
Gable End Frame (see figure B3-41). If a Gable End
Frame is used, it must match the profile of the adjacent
trusses so that proper bottom chord plane bracing can
be installed (see figure B3-42A) unless special bracing is
designed to support the end wall.
NOTE:
1.MINIMUM GRADE OF #2 MATERIAL IN THE TOP
AND BOTTOM CHORDS.
2.CONNECTION BETWEEN BOTTOM CHORD OF
GABLE END TRUSS AND WALL TO BE PROVIDED
BY PROJECT ENGINEER OR ARCHITECT.
3.BRACING SHOWN IS FOR INDIVIDUAL TRUSS
ONLY. CONSULT BLDG. ARCHITECT OR ENGINEER
FOR TEMPORARY AND PERMANENT.
4."L" BRACES SPECIFIED ARE TO BE FULL LENGTH.
GRADES 1x4 SRB OR 2x4 STUD OR BETTER WITH
ONE ROW OF 10d NAILS SPACED 6" O.C.
5.DIAGONAL BRACE TO BE APPROXIMATELY 45
DEGREES TO ROOF DIAPHRAGM AT 4'-0" O.C.
6. CONSTRUCT HORIZONTAL BRACE CONNECTING
A 2x6 STUD AND A 2x4 STUD AS SHOWN WITH
16d NAILS SPACED 6" O.C. HORIZONTAL BRACE
TO BE LOCATED AT THE MIDSPAN OF THE
LONGEST SUD. ATTACH TO VERTICAL STUDS
WITH (4)10 NAILS THROH 2x4. (REFR TO
SECTION A-A)
7.GABLE STUD DEFLECTION MEETS OR EXCEEDS
L/240.
8.THIS DETAIL DOES NOT APPLY TO STRUCTURAL
GABLES.
9.DO NOT USE FLAT BOTTOM CHORD GABLES NEXT
TO SCISSOR TYPE TRUSSES.
10.SOUTHERN PINE LUMBER DESIGN VALUES ARE
THOSE EFFECTIVE 06-01-12 BY SPIB/ALSC.
(2)-10d NAILS
ROOF SHEATHING
(4)-8d NAILS MINIMUM, PLYWOOD
SHEATHING TO 2x4 STD SPF BLOCK
PROVIDE 2x4 BLOCKING BETWEEN THE FIRST TWO TRUSSES AS
NOTED. TOENAIL BLOCKING TO TRUSSES WITH (2)-10d NAILS AT
EACH END. ATTACH DIAGONAL BRACE TO BLOCKING WITH (5)-10d
COMMON WIRE NAILS.
DIAGINAL BRACE
AT 1/3 POINTS IF
NEEDED
2x6 DIAGONAL BRACE SPACED 48"
O.C. ATTACHED TO VERTICAL WITH
(4)-16d COMMON WIRE NAILS AND
ATTACHED TO CLOCKING WITH
(5)-10D COMMONS
END WALLHORIZONTAL BRACE
(SEE SECTION A-A)
TRUSSES @ 24" O.C.
12
VARIES TO COMMON TRUSS
- DIAGONAL BRACING REFER
TO SECTION A-A
- L-BRACING REFER TO
SECTION B-B
A
A
B B
24" MAX
DIAGONAL BRACE
4'-0" O.C. MAX
VERTICAL STUD
(4)-16d COMMON WIRE
NAILS
(2)-10d COMMON WIRE
NAILS INTO 2X6
DIAGONAL BRACE
SECTION A-A
TRUSS GEOMETRY AND
CONDITIONS SHOWN
ARE FOR ILLUSTRATION
ONLY
TYPICAL _x4 L-BRACE
NAILED TO 2x_
VERTICALS WITH 10d
NAILS, 6" O.C.
16d COMMON WIRE
NAILS SPACED 6" O.C.
2x6 STUD OR 2x4
No.2 OR BETTER
TYPICAL HORIZONTAL
BRACE NAILED TO 2x_
VERTICALS WITH
(4)-10d COMMON NAILS2x4 STUD
SECTION B-B
MAX MEAN ROOF HEIGHT = 30 FEET
CATEGORY II BUILDING
EXPOSURE B OR C
ASCE 7-98, ASCE 7-02, ASCE 7-05 90
MOH
ASCE 7-10 115 MPH
DURATION OF LOAD INCREASE : 1.60
STUD DESIGN IS BASED ON COMPONENTS
AND CLADDING CONNECTION OF BRACING
IS BASED ON MWFRS.
2x4 SP No. 3/STUD
MINIMUM
STUD SIZE
SPECIES
AND GRADE
STUD
SPACING
* DIAGONAL BRACES OVER 6'-3" REQUIRES A 2x4 T-BRACE ATTACHED TO ONE EDGE.
DIAGONAL BRACES OVER 12'-6" REQUIRE 2X4 I-BRACE ATTACHED TO BOTH EDGES.
FASTEN T AND I BRACES TO NARROW EDGE OF DIAGONAL BRACE WITH 10d COMMON
WIRE NAILS 8in O.C., WITH 3 INCH MINIMUM END DISTANCE. BRACE MUST COVER 90%
OF DIAGONAL LENGTH.
2x4 SP No. 3/STUD
2x4 SP No. 3/STUD
12" O.C.5-1-15 6-5-2 9-0-15 10-3-13 15-5-12
WITHOUT
BRACE
MAXIMUM STUD LENGTH
1x4
L-BRACE
2x4
L-BRACE
DIAGONAL
BRACE
2 DIAGONAL
BRACE AT
1/3 POINTS
16" O.C.4-8-4 5-6-13 7-10-7 9-4-8 14-0-12
24" O.C.4-1-2 4-6-8 6-5-2 8-2-5 12-3-7
(c)IDDI 2015 - dwj
Attic Venting Calculation
Attic Area = approximately NO ATTIC area
- calc. = 1300 (with 40-50% ridge venting
min.
and vapor barrier installed on the
warm-in-winter side of ceiling)
- 0 sq.ft. of total attic venting required
ridge venting = up to 4.83 sq.ft. available
(lf. of ridge x 12" x 2 sides / 144)
(29 lf. x 12 x 2 / 144)
soffit venting = up to 14.5 sq.ft. available
(lf. of soffit x 12" x 3" wide / 144)
(58 lf. x 12 x 3 / 144)
- 18x24 gable end vents or equivalent may
be added if desired
City of Bozeman Stamp
Structural Engineering Stamp
(c)IDDI 2018 - dwj
Gable End Truss
Connection Detail
* CONTRACTOR NOTE:
ICE BARRIER IS REQUIRED (R905.1.2)
Shall extend from lowest edges of all
roof surfaces to a point at least 24"
inside the exterior wall line of the
building.
Requirement may be met with:
- Malarkey Arctic Seal 401