Gravity Loading - Dead Load Take-off

Inputs

Location 242 3RD Ave, Seattle

No. of Stories 60

Occupancy Residential

Typical Residential Floor (floors 2 through 60) Item Beams Girders Columns Seismic

3 1/4" LW Concrete infill over 46 psf 46 psf 46 psf 46 psf

W3x18Ga. Verco Metal Decking 3 psf 3 psf 3 psf 3 psf

WF Beams 3 psf 3 psf 3 psf 3 psf WF Girders - psf 3 psf 3 psf 3 psf

WF Columns - psf - psf 3 psf 3 psf Lateral System - psf - psf 4 psf 4 psf

Fireproofing 2 psf 2 psf 2 psf 2 psf Mechanical 5 psf 3 psf 3 psf 3 psf

Ceiling/Lighting 3 psf 3 psf 3 psf 3 psf 7/8" Hardwood

Flooring 4 psf 4 psf 4 psf 4 psf Subtotal 66 psf 67 psf 74 psf 74 psf

Miscellaneous (5-7% subtotal) 4 psf 4 psf 4 psf 4 psf

TOTAL 70 psf 71 psf 78 psf 78 psf

0

100

200

300

400

500

600

700

800

900

0 1000 2000 3000 4000 5000 6000

Sto

ry H

eigh

t, H

(ft

)

Story Shear, kips

Story Shears vs. Story Height for Wind and Seismic Loading

N/S Wind StoryShear (kips)

E/W Wind StoryShear (kips)

Seismic StoryShear (kips)

WIND LOADING PARAMETERS Parameter Reference

Risk Category RISK

III ASCE 7-16, Table

1.5-1

Basic Wind Speed V = 104 mph ASCE Wind

Hazard Wind Directionality Kd = 0.85 ASCE 7-16, § 26.6 Building Exposure EXPOSURE C ASCE 7-16, § 26.7

Topographic Factor Kzt = 1 ASCE 7-16, § 26.8 Ground Elev. Factor Ke = 1 ASCE 7-16, § 26.9 Gust Effect Factor G = 0.85 ASCE 7-16, § 26.11 Internal Pressure GCpi = 0.18 ASCE 7-16, § 26.13

External Pressure (Windward) Cp = 0.8 ASCE 7-16, Fig.

27.3-1

External Pressure (Leeward) Cp = 0.5 ASCE 7-16, Fig.

27.3-2 Building Height h = 785 ft

Story Height hSTORY = 13 ft Dim // to Wind L = 114 ft Dim ⊥ to Wind B = 152 ft

Height zg = 900 ft ASCE 7-16, Table

26.11-1

Factor α = 9.5 ASCE 7-16, Table

26.11-2

EARTHQUAKE LOADING PARAMETERS Parameter Reference

Seismic Design Category SDC = D ASCE 7-16, § 11.5 Response Modification, Special Reinf.

Conc. Shear Wall R = 5 ASCE 7-16, Table 12.2-2

Importance Factor Ie = 1.25 ASCE 7-16, Table 1.5-2 0.2s Design spectral accel. SDS = 1.11 g SEAOC Design Maps

1s Design spectral accel. SD1 = 0.585 g SEAOC Design Maps 1s MCER ground motion S1 = 0.484 g SEAOC Design Maps

Long period transition period TL = 6 sec SEAOC Design Maps

Approx. Period parameter Ct = 0.02 ASCE 7-16, Table 12.8-2 Structural height hn = 785 ft

Approx. Period parameter x = 0.75 ASCE 7-16, Table 12.8-2 Approx. Period, Ta = Cthn

x Ta = 2.97 sec ASCE 7-16, § 12.8.2.1 Seismic Response Coefficient,

Cs = SDS/(R/Ie) Cs = 0.278 ASCE 7-16, § 12.8.1.1

Cs need not exceed: For Ta ≤ TL

Cs = SD1/Ta(R/Ie) Cs = 0.049 ASCE 7-16, 12.8-3

For Ta > TL Cs = (SD1)(TL)/(Ta)2(R/Ie)

Cs = N/A ASCE 7-16, 12.8-4

Cs shall not be less than: Cs = 0.044SDSIe ≥ 0.01 Cs = 0.061 ASCE 7-16, 12.8-5

If S1 ≥ 0.6g, Cs not less than: Cs = 0.5S1/(R/Ie) Cs = N/A ASCE 7-16, 12.8-6 Final Cs value Cs = 0.049

Effective Seismic Weight W = 81095 kips Seismic Base Shear

V = CsW V = 4005 kips ASCE 7-16, 12.8-1

0

50

100

150

200

250

300

350

0 20 40 60 80 100 120 140 160 180 200

Ben

din

g D

efle

ctio

n (

in)

Core Thickness, t (in)

Core Thickness vs. Bending Deflection

0

20

40

60

80

100

120

140

1601

00

12

0

14

0

16

0

18

0

20

0

22

0

24

0

26

0

28

0

30

0

32

0

34

0

36

0

38

0

40

0

42

0

44

0

46

0

48

0

50

0

52

0

54

0

56

0

58

0

60

0

62

0

64

0

66

0

68

0

70

0

72

0

74

0

76

0

78

0

80

0

Def

lect

ion

(in

)

Structural Height, H (ft)

Effectiveness of Core in Resisting Building Deflection for Varying Heights for a 36" Thick Core

Δb

Δallow

0

10

20

30

40

50

60

70

80

H/2 H H/3 2H/3 H/2 & H H/3 & 2H/3

Ro

of

Def

lect

ion

(in

)

Outrigger Location

Roof Deflection for Various Outrigger Locations

0

20000

40000

60000

80000

100000

120000

140000

160000

180000

H/2 H H/3 2H/3 H/2 & H H/3 & 2H/3

Mo

men

t at

Bas

e (k

ip-f

t)

Outrigger Locations

Moment in Core at Base for Various Outrigger Locations

0

500

1000

1500

2000

2500

3000

H/2 H H/3 2H/3 H/2 & H H/3 & 2H/3

Axi

al F

orc

e in

Co

lum

n (

k)

Outrigger Location

Axial Force in Columns at Base for Various Outrigger Locations

0

10

20

30

40

50

60

70

80

10 Story Module 5 Story Module 6 Story Module 3 Story Module

Ro

of

Def

lect

ion

(in

)

Diagrid Configuration

Roof Deflection for Diagrid Configurations