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ParkingConventional Steel Framing Study

148 PARKING SPACES

202 PARKING SPACES

2 AISC Parking: Conventional Steel Framing

Project Information• Denver, Colo.• Five-story parking

structure• Conventional

steel framing with castellated in-fill beam (optional)

• Steel ordinary concentrically braced frames and moment frames

• Typical floor-to-floor height: 11’-4”

This document has been prepared in accordance with information made available to the American Institute of Steel Construction at the time of its preparation. While it is believed to be accurate, it has not been prepared for conventional use as an engineering or construction document and should not be used or relied upon for any specific application without competent professional examination and verification of its accuracy, suitability and applicability by a licensed engineer, architect or other professional. AISC disclaims any liability arising from information provided by others or from the unauthorized use of the information contained in this document.

Architectural Floor Plans

First Floor Plan

Concentrically Braced Frame

Moment Frame Typical Floor Plan

W24 W30 W30 W30 W30 W30 W30 W30 W30 W30 W24

W2

4

W3

0

W2

4

W27

W2

4

W18W27

W3

0

W2

4

W27

W2

4

W27

W2

7

W2

1

W2

1

W14 W14

W30 W30 W30 W30 W30 W30 W30 W30 W30

W2

1

W2

1

W1

8

W1

8

W18 W18 W18 W18

W18 W18 W18 W18 W18

W24 (CB30)

DOWN

W24 (CB30)

W16W16

1

2

3

4

5

6

7

8

9

10

11

MLKJHGFEDCBA

180'-0

"

270'-6"

4.2

9.2

UP

W24 (CB30)

W12

W1

2

W12

W1

2

BR

AC

ED

FR

AM

E

BR

AC

ED

FR

AM

E

BRACED FRAME BRACED FRAME

BRACED FRAME BRACED FRAME

BR

AC

ED

FR

AM

E

BR

AC

ED

FR

AM

EB

RA

CE

DF

RA

ME

BR

AC

ED

FR

AM

E

AISC Parking: Conventional Steel Framing 3

Schedule and PricingContact the Steel Solutions Center for assistance with locating an AISC member fabricator in your area for pricing and schedule information. You may also search our website for further information on member fabricators in your region. AISC member fabricators are an excellent source of pricing and schedule information. Email [email protected] or call 866.ASK.AISC to find an AISC member fabricator in your area.

Typical Structural Framing PlanSee pages 5 through 8 for detailed framing plans and frame elevations.

Steel Quantity TotalsSee page 4 for detailed steel quantity information.

Total Building Area = 192,730 sq. ftTotal Steel Tonnage Total Pounds Per sq. ft Total Pieces Total Studs Total Cambered Beams

728 7.55 939 10,722 354

Steel BenefitsStructural steel’s recycled content and recycling rate exceed those of any other construction mate-rial, with steel produced within the United States containing approximately 93% recycled steel scrap and 98% of all structural steel recycled back into new steel products, at the end of a building’s life.

Steel framing will reduce overall project costs, including lower foundation costs due to steel’s higher strength-to-weight ratio, gener-al condition savings due to faster construction schedules, and increased revenue from earlier occupancy thanks to faster construction.

Castellated in-fill beams include web openings at a regular interval, which can easily accommodate mechanical, electrical, and plumbing services through the web openings rather than under the beam.

Long-span beams with open, column-free spaces are ideal for parking


Loading Summary Gravity LoadingLive LoadsGarage 40 psfRoof Snow 20 psfDead LoadsTypical Floor 46 psf (2 in. metal deck with

4½ in. NW Concrete)

Superimposed Dead LoadsFloof 5 psf (CMEP, etc.)CladdingPrecast Façade 600 plfWind LoadingBasic Wind Speed 115 mphExposure Category CDrift Limit H/500

Seismic LoadingSeismic Design Category CSeismic Importance Factor 1.00Spectral Response Acceleration, Short Period, Ss

0.182 g

Spectral Response Acceleration, One Second Period, S1

0.058 g

Site Class DBuilding Period Coefficient, CT 0.02Response Modification Factor, R 3.00System Overstrength Factor, Ω0 3.00Deflection Amplication Factor, Cd 3.00Allowable Story Drift Coefficient 0.02Lateral Force Resisting SystemSteel Systems Not Specifically Detailed For Seismic ResistanceRisk Category II

Steel Quantity TakeoffSuspended Steel Floor Areas Total Area 194,760 ft2

Estimated Steel QuantitiesGravity Columns W12s 42 tons 0.43 psf 76 piecesLateral Frames Beams 26 tons 0.27 psf 40 pieces

Columns 44 tons 0.49 psf 80 piecesBraces (HSS) 30 tons 0.31 psf 80 pieces

Column & Lateral Subtotal 146 tons 1.5 psf 276 pieces

Conventional OptionWide Flange Beams 953 tons 9.79 psf 637 pieces

21,444 tons354 Beams cambered between 0.75 in. and 2 in.

Steel not indicated in sketches (5%) 55 tons 0.56 psfColumn & Lateral Subtotal 146 tons 1.50 psf 276 piecesConventional Option Total 1154 tons 11.85 psf 913 pieces

Castellated OptionCastellated Beams 455 tons 4.67 psf 332 piecesWide Flange Beams 285 tons 2.93 psf 305 pieces

15,816354 Beams cambered between 0.75 in. and 2 in.

Steel not indicated in sketches (5%) 44 tons 0.45 psfColumn & Lateral Subtotal 146 tons 1.50 psf 276 piecesCastellated Option Total 930 tons 9.55 psf 913 pieces

Notes1. The quantities are based on centerline dimensions. 2. Steel not indicated in sketches accounts for framing not included in the estimate such as framing for openings

or various members eliminated for simplification. It does not include connection material, slab edge material or façade attachments.

Material Specification1. Wide flange shapes are ASTM A9922. Rectangular HSS sections are ASTM A500 Gr. C.


Castellated Beam Advantages• Members are lightweight and structurally sound. • Members, like wide flange framing, can be painted

or fire protected. • Beams provide lower floor-to-floor height by passing

ductwork and utilities through openings. • Members, like wide flange framing, provide a bright

and open look. • Steel construction has the ease and speed of erection.

FabricationThe fabrication process for castellated members can be performed easily by today’s more automated fabrication shops. The sections are created by cutting a standard wide-flange shape in a zig-zag pattern along the web, separating the member into two halves. The two halves (which can originate from two different parent wide flange sizes) are then welded at the web posts to create the castellated member. During the creation of these members, camber can be fabricated into the cutting/welding of the member. For castellated beams, it is recommended that a high-performance coating system be utilized rather than galvanizing as this decreases the chances of cracks forming at the edges of the hexagonal openings during the galvanization process.

Castellated Shape UsageCastellated beams have been used in the United States for nearly every building usage and exhibit the inherent advantages of building with structural steel. In addition, castellated beams can also provide advantages, allowing MEP systems to move from being placed below the beams and girders to within the openings of the castellated members. This can reduce the floor-to-floor height of the facility, and allows for easy organization and modification of these systems. Exposed castellated beams allow for the flow of light (natural or bulb) through the webs of the beams providing greater indoor environments.

W2

4x5

5W

30

x90

W

30

x90

W

30

x90

W

30

x90

W

30

x90

W3

0x9

0

W3

0x9

0

W3

0x9

0

W3

0x9

0

W2

4x5

5W24x68

W30x116

W24x68

W2

7x1

78

C

W24x68

W24x68 C

W1

8x4

0 C

W2

7x1

78

C

W24x68 C

W30x99

W24x68

W2

7x1

78

C

W24x78 C

W2

7x1

61

C

W27x84 C

W21x50 C

W21x50 C

W1

4x2

2W

14

x22

W3

0x9

0

W3

0x9

0

W3

0x9

0

W3

0x9

0

W3

0x9

0W

30

x90

W

30

x90

W

30

x90

W

30

x90

W21x50 C

W21x50 C

W18x35 C

W18x35 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

SEE RAMPFRAMING PLANS

W24x76 (CB30x44) C W24x76 (CB30x44) C

W24x76 (CB30x44) C W24x76 (CB30x44) C

W24x68 (CB30x44) C

W24x68 (CB30x44) CW24x68 (CB30x44) C

W24x68 (CB30x44) C

W24x68 (CB30x44) CW

24

x68

(C

B3

0x4

4)

C

W24x68 (CB30x44) C

W24x68 (CB30x44) C

DO

WN

W2

4x6

8 (

CB

30

x44

) C

UP

W1

6x2

6

W1

6x2

6

1 2

19'-6"

3 4

18'-0"

5

12'-0"

6 7

18'-0"

8

18'-0"

9

26'-0"

10

24'-0"

11

M

20'-6"

L

25'-6"

K

25'-6"

J

25'-6"

H

25'-6"

G

25'-6"

F

25'-6"

E

25'-6"

D

25'-6"

C

25'-6"

B

20'-6"

A

10'-6"180'-0"

10'-0" 12'-0"

270'-6"

4.2

2'-0"

9.2

10'-0"

BRACED FRAME 1

FRAME 2

FRAME 2 FRAME 2

FRAME 2

BR

AC

ED

FR

AM

E 3

BRACED FRAME 1

BR

AC

ED

FR

AM

E 3

BR

AC

ED

FR

AM

E 3

BR

AC

ED

FR

AM

E 3

BRACED

BRACED BRACED

BRACED

Typical Floor Framing Plan


Notes:1. Each member is marked with the estimated member

size for wide-flange (W) or alternate castellated (CB) beam and the designation for camber; the size of the castellated beam is indicated within the parentheses. If present, the designation “C” indicates an assumed camber from ¾ in. to 2 in. The estimated number of studs for each member is not indicated. A total estimated number of studs is provided in the quantities.

2. Boxes The wide-flange beams are pin-connected to the columns in the braced frames. NO special base plate detail is assumed for the columns.

3. indicates the direction of the estimated floor slab which consists of a 2 in. metal deck and a 4½ in. concrete topping.

4. See the Column Layout Plan and the Column Schedule for gravity column sizes.

5. All beams are W12×14, unless noted otherwise.

W2

4x5

5W

30

x90

W

30

x90

W

30

x90

W

30

x90

W

30

x90

W3

0x9

0

W3

0x9

0

W3

0x9

0

W3

0x9

0

W2

4x5

5W24x68

W30x116

W24x68

W2

7x1

78

C

W24x68

W24x68 C

W1

8x4

0 C

W2

7x1

78

C

W24x68 C

W30x108

W24x68

W2

7x1

78

C

W30x90 C

W2

7x1

61

C

W30x90 C

W21x50 C

W21x50 C

W2

1x4

4W

21

x44

W3

0x9

0

W3

0x9

0

W3

0x9

0

W3

0x9

0

W3

0x9

0W

30

x90

W

30

x90

W

30

x90

W

30

x90

W21x50 C

W21x50 C

W18x35 C

W18x35 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

W1

8x4

0 C

SEE RAMPFRAMING PLANS

W24x76 (CB30x44/57) C W24x76 (CB30x44/57) C

W24x76 (CB30x44/57) C W24x76 (CB30x44/57) C

W24x68 (CB30x44/57) C

W24x68 (CB30x44/57) CW24x68 (CB30x44/57) C

W2

4x6

8 (

CB

30

x44

/57

) C

DO

WN

UP

W1

6x2

6

W1

6x2

6

W24x68 (CB30x44/57) C

W24x68 (CB30x44/57) C

W2

4x6

8 (

CB

30

x44

/57

) C

W24x68 (CB30x44/57) C

W24x68 (CB30x44/57) C

1 2

19'-6"

3 4

18'-0"

5

12'-0"

6 7

18'-0"

8

18'-0"

9

26'-0"

10

24'-0"

11

M

20'-6"

L

25'-6"

K

25'-6"

J

25'-6"

H

25'-6"

G

25'-6"

F

25'-6"

E

25'-6"

D

25'-6"

C

25'-6"

B

20'-6"

A

10'-6"180'-0"

10'-0" 12'-0"

270'-6"

4.2

2'-0"

9.2

10'-0"

FRAME 2

FRAME 2 FRAME 2

FRAME 2

BR

AC

ED

FR

AM

E 3

BR

AC

ED

FR

AM

E 3

BR

AC

ED

FR

AM

E 3

BR

AC

ED

FR

AM

E 3

BRACED

BRACED BRACED

BRACED

BRACED FRAME 1

BRACED FRAME 1


Roof Framing Plan







W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

TYPICAL RAMP

SLO

PE

RA

MP

DO

WN

AP

PR

OX

IMA

TE

LY

3/4

" P

ER

FO

OT

W24x6

8 (

CB

30x4

4)

C

5

12'-0"

6 7

18'-0"

8

18'-0"

9

K

25

'-6

"

J

25

'-6

"

H

25

'-6

"

G

25

'-6

"

F

25

'-6

"

E

12'-0"

25

'-6

"2

5'-6

"

D

C

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

SLO

PE

RA

MP

DO

WN

AP

PR

OX

IMA

TE

LY

3/4

" P

ER

FO

OT

W24x6

8 (

CB

30x4

4)

C

K

25'-6"

J

25'-6"

H

25'-6"

G

25'-6"

F

25'-6"

E

5

12'-0"

6 7

18'-0"

8

18'-0"

9

12'-0"


Typical Ramp Framing Plan







Second Floor Ramp Framing Plan

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

W21x4

4

FIFTH FLOOR RAMP

SLO

PE

RA

MP

DO

WN

AP

PR

OX

IMA

TE

LY

3/4

" P

ER

FO

OT

W24x6

8 (

CB

30x4

4/5

7)

C

5

12'-0"

6 7

18'-0"

8

18'-0"

9

K

25

'-6

"

J

25

'-6

"

H

25

'-6

"

G

25

'-6

"

F

25

'-6

"

E

12'-0"

25

'-6

"2

5'-6

"

D

C

W12x19

W12x19

W12x1

9

W12x1

9

W12x19

W12x19

W12x1

9

W12x1

9

10

24'-0"

11

M

20

'-6

"

L

22

9'-6

"

B

20

'-6

"

ABRACEDFRAME 1

BRACEDFRAME 1

High Roof Framing Plan

Roof Ramp Framing Plan








C1 C1 C1 C1

C1

C1C4

C2

C2

C2

C2

C2

C2

C2

C2

C3

C3 C3

C3

C3

C1 C1 C1 C1C3

C2

C2

C2

C2

C2

C2

C2

C2

C2

C2 C4

1 2

19'-6"

3 4

18'-0"

5

12'-0"

6 7

18'-0"

8

18'-0"

9

26'-0"

10

24'-0"

11

M

20'-6"

L

25'-6"

K

25'-6"

J

25'-6"

H

25'-6"

G

25'-6"

F

25'-6"

E

25'-6"

D

25'-6"

C

25'-6"

B

20'-6"

A

10'-6"180'-0"

10'-0" 12'-0"

270'-6"

4.2

2'-0"

9.2

10'-0"

BRACED FRAME 1

FRAME 2

FRAME 2 FRAME 2

FRAME 2

BR

AC

ED

FR

AM

E 3

BRACED FRAME 1

BR

AC

ED

FR

AM

E 3

BRACED

BRACED BRACED

BRACED

BR

AC

ED

FR

AM

E 3

BR

AC

ED

FR

AM

E 3


Column Layout Plan

Notes:1. Boxes indicate lateral frames. The wide-flange beams

are pin-connected to the columns in the braced frames. NO special base plate detail is assumed for the columns.

2. See the Column Schedule for gravity column sizes.

W1

2X

12

0

W1

2X

12

0

W1

2X

65

W1

2X

65

W30X90

W30X90

W30X90

W30X90

HSS8X8X5/8 HSS8X8X5/8




9-A 10-A

36'-0"

BRACED FRAME 1

W1

2X

96

W1

2X

96

W1

2X

53

W1

2X

53

4.2-H 5-H

10'-0"

9-H 9.2-H

9-M 10-M

W1

2X

19

0

W1

2X

19

0

W1

2X

96

W1

2X

96

W24X55

W24X55

W24X55

W24X55

5-K 5-J

25'-6"

5-D 5-C

9-K 9-J

9-D 9-C

4.2-E 5-E

9-E 9.2-E

BASEEL = 0'-0"

2nd FLOOREL = 11'-4"

3rd FLOOREL = 22'-8"

4th FLOOREL = 34'-0"


BRACED FRAME 2 BRACED FRAME 3

11-A

11-M

24'-0"

W1

2X

40

W1

2X

40

W1

2X

40

W1

2X

65

W14X30

W14X30

W14X30

W14X30

W14X30ROOFEL = 55'-8"

COLUMN MARK

W12X

40

W12X

40

C1

W12X

58

W12X

40

C2W

12X

87

W12X

53

C3

BASEEL = 0'-0"

2nd FLOOREL = 11'-4"

3rd FLOOREL = 22'-8"



ROOFEL = 55'-8"

C4

W12X

40


Frame Elevations

Column Schedule

Notes:1. All braces are HSS6×6×5∕8, unless noted otherwise.

Photo courtesy of the God

frey Hotel C

hicago.

With almost 125,000 project teams assisted to date, AISC’s Steel Solutions Center

is a free resource made just for you.

Your project just got easier.

SSC Project #83301: Godfrey Hotel/Chicago, Ill.

AISC steel experts assisted the project team with the original structural concept. For the full story, visit aisc.org/godfrey.

STEEL SOLUTIONSCENTERwww.aisc.org/solutions866.ASK.AISC | [email protected]

© AISC 2019F161-19

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