Stanford GSB
Pre-SD Structural Narrative
4/30/07
Description of Structural Systems
Parking Garage
 4-story below grade concrete structure approximately 250 ft x 340 ft in plan.
 Column grid spacing will be 28’-6” in the east-west direction and 15’, 30’, 15’ across
each 60 parking strip width.
 Slab at level 1 that supports Faculty Office Bldg and Courtyards will consist of a 14”
thick one-way slab (non PT) and east-west girders and transfer girders that support
FOB building columns that do not align with the garage columns.
 Slabs supporting parking (P1, P2, P3) will be a 9” thick two way PT slab.
 Slab at lowest parking level (P4) will be a 6” thick slab-on-grade.
 Foundation will be shallow spread footings
 Perimeter walls will be 12” thick concrete walls
Faculty Office Building
 3-story structural steel building supported on lid of parking garage structure at level 1.
 Composite wide flange beams and girders
 Wide flange columns
 Lightweight concrete filled metal deck slabs (3” deck + 3” concrete fill)
 Steel brace frame lateral system
 Columns of brace frames will align with parking garage columns.
 Assume structural steel requires 1-hour fireproofing
Serra Row Building
 3-story structural steel building
 Composite wide flange beams and girders
 Wide flange columns
 Lightweight concrete filled metal deck slabs (3” deck + 3” concrete fill)
 Steel brace frame lateral system
 Foundation will be shallow spread footings
 Assume structural steel requires 1-hour fireproofing
Arguello Building
 3-story structural steel building plus one level basement
 Composite wide flange beams and girders
 Wide flange columns
 Lightweight concrete filled metal deck slabs (3” deck + 3” concrete fill)
 Steel brace frame lateral system
 Foundation will be shallow spread footings
 Assume structural steel requires 1-hour fireproofing
Commons Building
 Commons Building includes the Library, Dining and Auditorium facilities and consists
of 4-, 3- and 2-story structure above a one level basement.
 Concrete structure with 2-way flat slabs or beams and slabs.
 Foundation will be shallow spread footings
Stanford GSB
Pre-SD Structural Narrative
4/30/07
Structural Material Quantities for Cost Estimating
Parking Garage
 Slab at level 1 – 14” thick one-way slab with east-west griders – concrete volume =
1.50 CF/SF, mild reinforcing = 11 psf and PT reinforcing in girders = 0.4 psf
 Slab at Levels P1, P2, P3 – 9” flat slab – concrete volume = 0.75 CF/SF, mild
reinforcing = 3.0 psf, PT reinforcing 2.0 psf
 Slab at level P4 – 6” concrete slab on grade with #4 at 12” o.c.
 Shallow spread footings – concrete volume = 1.0 CF/SF, reinforcement = 5 psf
 Perimeter walls will be 12” thick concrete walls with 6 psf of reinforcement
 Columns = 24” diameter with 14 pcf of reinforcing.
Faculty Office Building
 Steel structure weight – 16 psf
 Roof and suspended floor slabs - Lightweight concrete filled metal deck - 3”x18ga
deck w/ 3.25” concrete fill and #3 at 12”o.c. reinforcement.
Serra Row Building
 Steel structure weight – 16 psf
 Lightweight concrete filled metal deck slabs - 3”x18ga deck w/ 3.25” concrete fill and
#3 at 12”o.c. reinforcement.
 Slab-on-grade – 5” slab with #4 at 12” o.c.
 Spread footings and grade beams – concrete 0.8 CF/SF with 4 psf of reinforcement.
Arguello Building
 Steel structure weight – 16 psf
 Lightweight concrete filled metal deck slabs - 3”x18ga deck w/ 3.25” concrete fill and
#3 at 12”o.c. reinforcement.
 Basement Walls – 12” thick walls with 5 psf reinforcement
 Slab-on-grade – 5” slab with #4 at 12” o.c.
 Spread footings and grade beams – concrete 0.8 CF/SF with 4 psf of reinforcement.
Commons Building
 Concrete Floor Structure – concrete volume = 0.75 CF/SF, reinforcement = 7 psf
reinforcement.
 Basement Walls – 12” thick walls with 5 psf reinforcement
 Basement Slab on grade – 5” slab with #4 at 12” o.c.
 Spread footings and grade beams – concrete 0.9 CF/SF with 4.5 psf of reinforcement.
Page 2 of 3
Stanford GSB
Pre-SD Structural Narrative
4/30/07
Structural Material Specification
Reinforced Concrete
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Concrete for flat slabs and beams – Normal Weight, F’c = 5000 psi
Concrete for walls and columns – Normal Weight, F’c = 4000 psi
Concrete for slab-on-grade and foundation – Normal weight, F’c = 4000 psi
Concrete fill in metal decks - Normal-weight, f’c = 4000 psi
Concrete for walls, columns, suspended slabs, slab-on-grades, and fill in metal deck
shall have flyash / cement ratio of 50 percent. Ground Granulated Blast-Furnace Slag
may be used in lieu of flyash.
Reinforcing bars: ASTM A615 GR 60 (ASTM A706 where welding is required)
Structural Steel
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Structural Shapes: ASTM A992 Grade 50 (Fy = 50 ksi).
Plates: ASTM A572 grade 50
Structural Steel Tubing Sections (TS or HSS Sections): Square and Rectangular
Sections: ASTM A500, Grade B (Fy = 46 ksi); Round Sections: ASTM A500, Grade C
(Fy = 46 ksi)
Steel Pipe Sections: ASTM A53 Type E or S (welded or seamless), Grade B (Fy =
35ksi) or ASTM A501 (Fy = 35ksi)
High Strength Bolts: High strength bolts, nuts and washers shall comply with
ASTM A325 with unless otherwise noted. ASTM A490 where indicated on the
drawings. “Twist Off” type tension controlled bolt / nut / washer assemblies are
allowed and shall conform to ASTM F1852.
Anchor Rods and Anchor Bolts: ASTM A1554, Grade 55 (grade 105 where
designated on Drawings)
Headed studs: ASTM A108
Deformed Bar Anchors: Stud type, ASTM A 496 cold finished low-carbon steel,
minimum tensile strength of 80,000 psi. Provide Nelson Deformed Bar Concrete
Anchors D2L or equal.
Welding electrodes: E70
Threaded rod: ASTM A36
Non-shrink grout for base plates: F’c = 8000 psi
Assume all structural steel is painted
Metal Deck
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Galvanized Steel Decking: ASTM A653 - SS Designation, Grade 33, Minimum yield 38
ksi, with zinc coating in accordance with ASTM A653, G60, unless otherwise indicated.
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