FLOOD02929

• County: Statewide
• Community: na
• Basin: Statewide
• Title: Manufactured Home Installation in Flood Hazard Areas
• Date: 9/1/1985
• Prepared By: FEMA
• Floodplain - Doc Type: Educational/Technical/Reference Information

Table 4.27

DIAGONAL LOADING
PER FOOT OF MANUFACTURED HOME
(pounds)

Height Above Wind Load
Grade (ft.) 15 psf 25 psf
3 149 248
4 151 252
5 155 257
6 159 265
7 164 273
8 170 283
10 183 305

Using Table 4.26 for the six foot above grade
height and eight inch post diameter, it is found that
3f4 irlfh bolts have a capacity of 1,147 pounds
each. The minimum number of bolts is calculated
as follows:

1987.5 lb.
1147 Ib.fbolt

= 1.73 or 2

Therefore, using two three-quarter inch bolts at
each diagonal wood bracing to vertical member
connection will be acceptable.

End Bracing

For end bracing at the ends of the manufactured
home, the size and number of bolts is determined
in the same manner as presented for cross brac-
ing. The load is determined using the manufac-
tured home width as follows:

Load = Width x Fd
2

For instance, if the 60 foot manufactured home
in the previous example was 14 feet wide, the load
per diagonal member is calculated as follows:

Load = 14 ft. x 265 Ib.fft.
2

= 1855 lb.

From Table 4.26 for the six foot above grade
height and eight inch post diameter, a three-
quarter inch diameter bolt has a capacity of 1,147
lb. The required number of bolts is calculated as
follows:

1855 lb.
1147 Ib.fbolt

= 1.6 or 2.0 bolts
per connection

The diagrams shown in Figures 4.52 and 4.53
provide minimum dimensions for placement of
bolts in the diagonal and vertical member connec-
tion. Bolt holes should be one-sixteenth inch larger
than the diameter of the bolt and all connection
hardware must be of corrosion resistant material.

~

. , , I

/i

1-3/4"

1-1/4'

Figure 4.52 Two Bolt Connection

~

, '

~"" ,~-
." ,
~/
~~j~
: ~___ ~2-1I2'

1-1/4'

1-1/4"

Figure 4.53 Four Bolt Connection

67