2006-12-28 Structural Design
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ovnanian@
Homes
ORANDUM
M E
M
DATE: 12-28-0G
TO: City of Albertville Building Department
FROM: Mitchell Llttfln
K. Hovnanlan Homes
Architectural Department
SUBJECT: Hunter's Pass Structural Design
Attached are copies of the engineering for the tall walls in each home
containing such structures. I have also attached some information obtained from
the 2000 IRC Code in regards to Bracing. Per the code we need a solid bracing at
each comer of an exterior wall which can either be angled let-in bracing or rigid
sheathing per the requirements of the code. The let-in bracing is typically installed
during construction as a temporary bracing until the walls are sheathed properly;
it remains in place only because it is easier to leave it within the wall than to
remove it. The let-in bracing is not installed for structural support even though it
does supply some support.
Our architects are getting me the engineering for the last tall walls
for the Elsey plans and I will send those as soon as I receive them.
If you have any questions regarding this please let me know.
i ell!':. Littfin
. '
Divislbll Architectural Manager
11
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Tometicb Enginccdng, lne.
Iowa 50322
(515) 28().fW22
Fax: (515) 727.9124
Joh Nalllt\ Auduhon
Job it U05-l57
lile: U05-l57
p, 1/
Dute:
Audubon
Calculations:
Audubon
A lbt~rtviHe,1t innesota
Submit to; Bloodgood. Sharp, Buster Architects
1601 \Vest Lakes Pkwy, #200
West Des Moines,]/\ 50266
I'hone
515.223.5 1 X2
515.221-3272
Fax
Review:
James E. Tometich. !',E.
la. Reg. if 11121
Tomdieh Inc,
4187 NW Urbandalc Dr.
Urbandale, IA 50322
(515) 280-8022
References:
Nebraska Reg # E-7577
No. Carolina Reg II 026324
Connecticut II 2304]
AISC Manual ftx Steel Construction, 9th Ed.
AISC Manual for Steel Construction, Load tmd Resistance
Factor Design, 2nd Ed., 1994
American Concrete Institute; 1\C1 318-02
InternUlional Building Code (!Be) . Z003 Edition
fhis project eellsi,;ts of designing
structure for a single 1i.U11ily house.
Certification:
I herehy that this document was prqHlred by .me
or under my direct personal supervis! and that I am it duly
Liccnst~d Professional Engineer undc e laws of the State of Iowa
QlutTLUBl
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J\'fy Registration Expires December 31, 2(X)8
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Tllmcticb t:nginccring. Inc.
Urbamlale, Iowa 50322
(515) 28(;.8022
Fax: (515) 727-9124
J Oil N amc:
Job II ti05-156
file: (!05-156
p, Ii
[)ah.~:
CQI,J~y
Calculations:
Copley
Albertville, Minnesota
Submit to: Bloodgood, Sharp, Buster l\rehi.tects
1601 West Lakes Pkwy, 11200
West Dto$ lvloines, lA. 50266
I'h01K~
1',1)(
515..223..5182
515-221-3272
Review:
James E. Tomctich, PE
Ia. Reg. # 11121
Tometich Enginecring, lIlt.
4187 NW Urbandale Dr.
Urbandale.l1\ 50322
(515) 280-8022
Rc'fcrences:
ATSCMallual f()f Steel Construction, 9th Ed.
AISC Manual for Steel C}ons!ruction , l.,oad and Resistance
Factor Design, 2nd Ed., 1994
American Concrete Institute; ACl 318-02
International Building Code (IBe) - 2003 Edition
Nebraska '# E,7577
No. Carolina #I 026324
Connectl,:ut Ii 2,~041
11]IS projcct cons! ;;ts
structure for a family house.
Certification:
that this cngineering dOHnnent was prepared by tIle
or under my direet personal sup(:rvi,,~9't and tbat 1 am a July
Lict~!lsed l>rofcssional Engineer unde ;e laws of the State of Iowa
SignatUre:
Date:
Registration #:
My Registration Expirt~s [)(:cembcr 31, 2008
Calcl
U05-156-calc1-IBC.xls
5-Jan.{)7
For SI: 1 inch = 25.4 mOl, 1 fool = 304.8 OInt.
Notell:
a. The lOp plate shall be continuous over header.
b. Jack studs shall be used for spans over 4 feel.
c. Cripple spacing shall be the same as for studs.
d. Wood structuml panel faces shall be single pieces of IS/32.incIHhick Exposure I (exterior glue) or thicker, inslalled on the interior or extcrior or both
sides of the header.
e. Wood structural panel faces shall be nailed to fnulling and cripples with 3d common or galvanized box nails spaced 3 inches all center. staggering
altetllllte nails 112 inch.
f. Galvanized nails shall be bot-dipped or tumbled.
FIGURE R602.7.2. R602.10.3
HEADER SPAN
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JACK STUDSb
WALL CONSTRUCTION
TOP PLATEa
(
INSULATION AS
REQUIRED
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1
WOOD STRUCTURAL
PANEL d,e
9IN.OR
151N.
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SECTION
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FIGURE R602.7.2
TYPICAL WOOD STRUCTURAL PANEL BOX HEADER CONSTRUCTION
R602.10.1 Braced wall lines. Braced walllincs shall consist
of braced wall panel construction methods in accordance
with Section R602, 10.3. The amount and location ofbracing
shall be in accordance with Table R602. I 0.1 and the amount
of bracing shan be the greater of that required by the Seismic
Design Category or the design wind speed. Braced wall pan-
els shall begin no more than 12.5 feet (3&10mm) from each
end of a braced wall line. Braced wan panels Ihat are counted
as part of a braced wall line shall be in line, except Ihat offsets
out-of-plane of up to 4 feet (1219 mm) shall be permitted
provided that the total out-lo-out offset dimension in any
braced wall line is not more than 8 feet (2438 mm).
A designed collector shall be provided if the bracing
begins more than 12 feet (3658 mm) from each end of a
braced wall line,
R602.10.2 Cripple wall bracing. Cripple walls shall be
braced with an amount and type of bracing as required for the
wall above in accordance with Table R602,lO.1 with the fol-
lowing modifications for the cripple wall bracing:
116
1. The percent bracing amount as determined from Table
R602.1O.3 shall be increased by 15 percent.
2. The wall panel spacing shall be decreased to I & feet
(5486 mm) instead of 25 feet (7620 mm).
R602.10.3 Braced waD panel construction methods. The
construction of braced wall panels shall be in accordance
with one of the following methods:
1. Nominall-inch-by-4-inch (25.4 mm by 102 mm) con-
tinuous diagonal braces let in to the top and bottom \
plates and the intervening studs or approved metal strap
devices installed in accordance with the manufacturer's
specifications. The let-in bracing shall be placed at an
angle not more than 60 degrees (1.06 rad) or less than
45 degrees (0.79 rad) from the horizontal.
2. Woodboardsof5/sinch(l5.9mm)netminimumthick- ( ..'
ness applied diagonally on studs spaced a maximum of
24 inches (610 mm). Diagonal boards shall be attached
to studs in accordance with Table R602.3(1).
c.
2000 INTERNATIONAL RESIDENTIAL CODEl!Il
WALL CONSmUCTION
('
3. Wood structural panel sheathing with a thickness not
less than 5/16 inch (7.9 mm) for 16-inch (406 mm) stud
spacing and not less than 3/8 inch (9.5 mm) for 24-inch
(610 mm) stud spacing. Wood structural panels shall be
installed in accordance with Table R602.3(3).
4. One-half-inch (12.7 mm) or 25/32-inch (19.8 mm) thick
structural fiberboard shMthing applied vertically on
studs spaced a maximum of 16 inches (406 mm) on cen-
ter. Structural fiberboard sheathing shall be installed in
accordance with Table R602.3(1).
5. Gypsum board with minimum 1/2-inch (12.7 mm)
thickness placed on studs spaced a maximum of
24 inches (610 mm) on center and fastened at 7 inches
(178 mm) on centcrwith nails in accordance with Table
R602.3(1).
6. Particleboard wall sheathing panels installed in accor-
dance with Table R602.3(4).
7. Portland cement plaster on studs spaced a maximum of
16 inches (406 rrun) on center and installed in accor-
dance with Section R703.6.
8. Hardboard panel siding when installed in accordance
with Table R703.4.
Exception: Alternate braced wall panels constructed in
accordance with Section R602.10.6 shall be permitted to
replace any of the above methods of braced wall panels.
R602.IO.4 Length of braced panels. For Methods 2, 3,4, 6
and 7 above, each' b{aced wall panel shall be at least
48 inches (1219 mm) in length, covering a minimum of three
stud spaces where studs are spaced 16 inches (406 mm) on
center and covering a minimum of two stud spaces where
studs are spaced 24 inches (610 mm) 011 center. For Method 5
above, each braced wall panel shall be at least 96 inches
(2438 mm) in length where applied to one face of a braced
wall panel and at least 48 inches (1219 mm) where applied to
both faces.
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Exceptions:
1. Lengths of braced wall panels for continuous wood
structural panel sheathing shall be in accordance
with Section R602.IO.S.
2. Lengths of alternate braced wall panels shall be in
accordance with Section R602.1O.6.
R602.IO.5 Continuous structural panel sheathing, When
continuous wood structural panel sheathing is provided in
accordance with Method 3 of Section R602.10.3, including
areas above and below openings, braced wall panel lengths
shall be in accordance with Table R602.1 0.5. Wood struc-
tural panel sheathing at corners shall be installed in accor-
dance with Figure R602.1O.5. The bracing amounts in Table
R602.10.3 for Method 3 shall be permitted to be multiplied
by a factor of 0.9 for walls with a maximum opening height
that does not exceed 85 percenl of the wall height or a factor
of 0.8 for walls with amaximum opening height that docs not
exceed 67 percent of the wall height.
R602.10.6 Altel'Date braced wall panels. Alternate braced
wall lines constructed in accordance with one of the follow-
ing provisions shall be permitted to replace each 4 feet
2000 INTERNATIONAL RESIDENTIAL CODE~
R602.10.4 - R602.10.8
(1219 mm) of braced wall panel as required by Section
R602.10.4:
1. In one-story buildings, each panel shall have a length of
not less than 2 feet, 8 inches (813 mm) and a height of
not more than 10 feet (3048 mm). Each panel shall be
sheathed on one face with 3/8-inch-minimum-thickness
(9.5 mm) wood structural panel sheathing nailed with
8d common or galvanized box nails in accordance with
TableR602.3( 1) and blocked at all wood structural pan-
el sheathing edges. Two anchor bolts installed in accol'-
dance with Figure R403.1 (I) shall be provided in each
panel. Anchor bolts shall be placed at panel quarter
points. Each panel end stud shall have a tic-down
device fastened to the foundation, capable of providing
an uplift capacity of at least 1,800 pounds (816.5 kg).
The tie-down device shall be installed in accordance
with the manufacturer's recommendations. The panels
shall be supported directly on a foundation or on floor
framing supported directly on a foundation which is
continuous ~ross the entire length of the braced wall
line. This foundation shall be reinforced with not less
than one No.4 bar top and bottom. When the continu-
ous foundation is required to have a depth greater than
12 inches (305 mm), a minimum 12-ineh-by-12-inch
(305 mm by 305 mm) continuous footing or turned
down slab edge is permitted at door openings in the
braced wall line. This continuous footing 01' turned
down slab edge shall be reinforced with not less than
one No.4 bar top and bottom. This reinforcement shall
be lapped 15 inches (381 mm) with the reinforcement
required in the continuous foundation located directly
under the braced wall line.
2. In the first story of two-story buildings, each braced
wall panel shall be in accordance with Item 1 above, ex-
cept that the wood structural panel sheathing shall be
provided on both faces, at least three anchor bolts shall
be placed at one-fifth points, and tie-down device uplift
capacity shall not be less than 3,000 pounds
(1360.8 kg).
R602,10.7 Panel joints. All vertical joints of panel sheath-
ing shall occur over studs. Horizontal joints in braced wall
panels shall occur over blocking of a minimum of 1112 inch
(38 mm) thickness.
Exception: Blocking is not required behind horizontal
joints where permitted by the manufacturer's installation
requirements for the specific sheathing material.
R602.10.8 Connections. Braced wall panel sole plates shall
be fastened to the floor framing and top plates shall be con-
nected to the framing above in accordance with Table
R602.3( I). Sills shall be fastened to the foundation or slab in
accordance with Sections R403.L6 and R602.1L Where
joists arc perpendicular to the braced wall lines above, block-
ing shall be provided under and in line with the braced wall
panels.
117