20110115 Structural Notes 12312010STRUCTURAL NOTES
General Notes:
These structural notes supplement the drawings. Any discrepancy found among the drawings, these notes,
and the site conditions shall be reported to the Engineer, who shall correct such discrepancy in writing. Any
work done by the Contractor after discovery of such discrepancy shall be done at the Contractor's risk.
The Contractor shall verify and coordinate the dimensions among all drawings prior to proceeding
with any work or fabrication. The Contractor shall coordinate between the architectural drawings and
the structural drawings. The architectural dimensions are taken to be correct when in conflict with the
structural drawings. The Contractor is responsible for all bracing and shoring during construction.
All construction shall conform to the applicable portions of the latest edition of the International Building Code
except where noted
Design Criteria:
1. Live Load = 40 PSF (Floors)
= 25 PSF (Snow)
2. Dead Load = 15 PSF (Roof)
= 12 PSF (Floor)
= 10 PSF (Walls)
= 150 PCF (Concrete)
3. Partition = 10 PSF (Floors)
4. Wind = 2009 IBC Exposure B @ 85 mph
5. Earthquake = 200916C
Site Class = D
Design Cat. = D
Use Group = I
R = 6.5
Cd = 4
W° = 3
6. Soil = 1500 PSF, Assumed bearing capacity
Concrete & Reinforcing Steel:
1. All concrete work shall be per the 2009 IBC Chapter 19. Tolerances shall be per IBC Chapter
19, Section 07. Mixing, placement, and inspection shall be per Sections 03, 04, 05, and 06.
2. All reinforcing shall be ASTM A615 Grade 60 except as shown on the plans.
3. Concrete shall be in accordance with ASTM 150.
fc = 2500 PSI @ 28 day
slump = 4" maximum, 6% Air entrained.
Steel:
FILE
1. Anchor bolts shall be ASTM A307 and will have a 3x3x1/4" plate washer.
Carpentry: t! ~ l~
1. 2X structural framing shall be #2 Douglas Fir_ {~ ~ --
~_~ i_r__ eY---------------------
4x structural members shall be #2 Douglas Fir.
6X members shall be #1 Douglas Fir.
2. Provide solid blocking in floor system below all bearing walls and point loads.
3. 2X joists shall be kiln dried and stored in a dry area prior to installation. The moisture content
of all wood shall be less than 15%.
4. Roof trusses shall be by apre-approved manufacturer and constructed according to the
specifications of the Truss Plate Institute. Truss shop drawings must be stamped by a
licensed engineer and be on site at the time of construction. Preliminary truss drawings must
be reviewed prior to construction. It is the truss manufacturer's responsibility to inform the
engineer of record of any changes from the preliminary truss lay-out.
Girder trusses to have a minimum of bearing studs equal to number of plies of truss. All
girder trusses shall have Simpson HGT tie down at either end to match number of plies.
Truss manufactures are responsible for all bracing of the trusses including end wall bracing
and all other bracing between the building and the trusses unless specifically shown
otherwise on the drawings. Contractor to coordinate bracing with engineer of record as
required.
5. Glue laminated beams shall be 24F-V8 for cantilevered or continuous beams and 24F-V4 for
simple spans.
(Fb = 2,400 PSI)
(Fv = 190 PSI)
(E = 1,800,000 PSI)
(FcL = 650 PSI)
6. Continuous and cantilevered glue laminated beams shall not be cambered. All other glue
laminated beams shall be cantilevered for L/480. See the framing plans for any exceptions.
7. Sheathing at roof and floor shall be laid with face grain perpendicular to supports and end
joints staggered 4'-0" on center. Provide 1/8" space at panel edges as required by panel
manufacturers. Floor sheathing shall be nailed 6" o.c. edges and 12"field with 10d's and roof
sheathing shall be nailed 6" o.c. edges and 12" o.c field with 10d's unless otherwise noted on
the drawings.
Block and nail all horizontal panel edges at designated shear walls.
Hardware:
All connection hardware shall be Simpson "Strong Tie". Connection hardware exposed to the weather or soil
shall be treated as in steel above.
CAUTION:
PLACE TRUSSES PER MANUFACTURER'S RECOMMENDATIONS AND BRACE PER TRUSS COMPANY
RECCOMENDATIONS. CONTRACTOR IS RESPONSIBLE FOR ALL TEMPORARY BRACING AND
SHORING REQUIRED FOR PLACING TRUSSES. NOTE THESE DRAWINGS DO NOT INCLUDE ANY
TEMPORARY SHORING OR BRACING. PRECISE ENGINEERING RECCOMENDS ALL SHORING AND
BRACING BE DESIGNED AND DETAILED BY A LISENCED ENGINEER.
CONTRACTOR TO FIELD VERIFY ALL CONDITIONS AND ALL ELEVATIONS.
HOLD DOWN SCHEDULE
It is the responsibility of the contractor to locate hold down anchor bolt to accommodate all
structural framing. Anchor bolt to be located nearest the corner or opening at the end of the
shear wall. All foundation vents to be a minimum of 12"off centerline of the anchor bolt on
either side. Holdown stud to be coordinated with shear wall panel edge framing
requirements. Larger stud size controls
® HDU2 attaches to concrete foundation with a 5/8" dia bolt with 15" minimum
embedment into concrete or a Simpson SSTB 16. HDU2 attaches to double
2x studs or 4x or 6x stud with (6) Simpson SDS 1/4 X 3 Wood Screws in
wall above.
(~jS) HDU4 attaches to concrete foundation with a 5/8" dia bolt with 16" minimum
~~ embedment into concrete or a Simpson SSTB 20. HDU4 attaches to double
2x studs or 4x or 6x stud with (10) Simpson SDS 1/4 X 3 Wood Screws in
wall above.
TYPICAL SHEAR WALL NOTES
Use 1/2" dia. by 10" Anchor Bolts (AB's) with single plates and 1/2" dia. by 12" AB's with double
and 3x plates spaced as shown on the drawings. AB's shall have 7" of embedment into footing, shall
be centered in the stud wall, and shall project through the bottom plate of the wall and have a
3x3/xl/4 plate washer.
All wall sheathing shall be 1 /2" CDX plywood, 5/8" T 1-11 siding, or 7/16" OSB with exterior
exposure glue and span rated "SR 24/0" or better. All free sheathing edges shall be blocked with 2x4
or 2x6 flat blocking except where noted on the drawings or below.
All nails shall be 8d or l Od common (8d common nails must be 0.131 inch diameter, Senco KC27
Nails are equivalent. If l Od common nails are called for the diameter must be 0.148 inches, Senco
MD23 Nails are equivalent). Nail size and spacing at all sheathing edges shall be as required below
or as in the drawings. Nail spacings shall be 12" o.c. for all field nailing except as noted.
Hold downs are Simpson "Strong Tie" and shall be installed per the manufacture's recommendation.
Equivalent hold downs by United Steel Products Company "Kant-Sag" that have ICBO approval can
be substituted in place of Simpson hold downs. All floor systems must be blocked solid below
member that the hold down is attached to. This block should be equal to or larger than the member
the hold down is attached to and be placed as a "squash block".
All double and triple studs shall glued and nailed together with l Od's at 3" o.c. for each layer.
All 4x studs are to be #2 DF and a116x studs are to be #1 DF when used for hold downs and shear
walls.
ALL WALL AND ROOF FRAMING LUMBER SHALL BE DOUG-FIR #2 OR BETTER.
NOTE: MST STRAPS attaches to (2) 2x or 4x studs in wall above and below unless noted
otherwise. Nail all holes with 16d sinkers.
SHEAR WALL SCHEDULE
sheathing nailed with 8d's at 6" on center all edges.
sheathing nailed with 8d's at 4" on center all edges and 4x or 6x studs at panel edges.