IBC_2006_and_ASCE_7-05

ASCE 7-05 (IBC 2006) WIND: BUILDING DATA: Basic wind speed (3 sec gust) = 90 MPH Exposure B Roof Pitch = Mean Roof Height h = Importance factor Iw =

4.00 :12 25 ft 1.00

T-6-1

6.4 METHOD 1- SIMPLIFIED PROCEDURE (LOW-RISE, 60 FT) Height Adjustment factor λ = 1.00 -10.70G -15.40E

-2.73D -4.92B

Fig 6-2

-7.97H -10.51F

-10.70G -15.40E

θ= 18.4

11.52C 17.27A

All forces shown in psf

=

8.50C 12.80A

12.42345

=

150.919

TRANSVERSE ELEV. 12.80A

-6.80H -8.80F

71.32 kips 3.9psf 32.82 k 8.7 psf

10 % of least dimension=

15.1 ft

40 % of the eave height =

5.0 ft

4 % of least dimension or 3 ft=

6.0 ft

therefore a =

6.0 ft

8.50C 492.125984251968 ft All forces shown in psf

11.52C

492.126

LONGITUDINAL ELEV.

2a= 12.1ft

150.918635170604 ft

H =37.6

Example: ps = λ KztIps30

(6-1)

Kzt =

1.00

6.5.7

horizontal load at end zone ps30 =

12.8

12.1ft

17.27A

PLAN VIEW

Height Adjustment factor λ = Importance factor Iw =

FIGURE 6.2, Main Wind Force System

1.00 1.00

Fig 6-2 X

Fig 6-2

X

6.2

12.80psf

MWFRS Load Direction

Transverse Longitudinal

Roof Angle 18.4 All

Horizontal Loads End Zone Interior zone Wall (A) Roof (B) Wall (C ) Roof (D) 17.27 -4.92 11.52 -2.73 12.8 -6.7 8.5 -4

Vertical Loads End Zone Interior zone WW (E) LW (F) WW (G) LW (H) -15.40 -10.51 -10.70 -7.97 -15.4 -8.8 -10.7 -6.8

Overhang EOH GOH -21.60 -16.90 -21.6 -16.9

* If roof pressure under horizontal loads is less than zero, use zero Plus and minus signs signify pressures acting toward and away from projected surfaces, respectively. For the design of the longitudinal MWFRS use Ө = 0°, and locate the zone E/F, G/H boundary at the mid-length of the building

FIGURE 6-3, COMPONENT AND CLADDING sq. ft, q= 18.4 Roof effective area = 30 Effective Area for wall element = 20 Sq. ft Interior Zone 1 = 9.45 -12.87 psf Wall, Interior Zone 4 = 13.90 -15.10 psf End Zone 2 = 9.45 -17.98 psf End Zone 5 = 13.90 -18.20 psf Conner Zone 3 = 9.45 -23.90 psf Roof Overhang effective area = 6 sq. ft Interior Zone 2 = -26.13 psf End Zone 3 = -36.71 psf IBC 1605.2.1(LRFD) U = 0.9D + 1.6W IBC 1605.3.1(ASD), U = 06D + W, increase in allowable shall not be used. IBC 1605.3.2(ASD), U = D + 1.3 W, allowable stress are permit to be increased.