Foundation for manufactured home

Stabilizer bars (28) and (30) extend across the lengths of the I-beam joists (12) and (14), beneath the piers (16) and (18). Tie down anchors (32) and (34) are placed in abutment with the outer ends of the stabilizer bars, so that the anchors cannot be pulled and bent toward the manufactured home due to the forces in the anchor ties (101) and (110). Tie down shoes (50) and (51) are mounted at the lower portions of the piers (16) and (18), and ties (101, 102, 104, 106, 108, 110) are connected to the tie down shoes so as to increase the resistance of the manufactured home (11) from shifting laterally and from lifting off the foundation.

FIELD OF THE INVENTION 
This invention relates to a foundation for a manufactured home which rests 
above the ground on piers. Anchors which penetrate the ground are 
connected by ties to the lower portion of the frame of the manufactured 
home, holding the home on the piers. 
BACKGROUND OF THE INVENTION 
Manufactured homes, such as mobile homes, trailers, prefabricated houses, 
and the like are manufactured at a central manufacturing site, and upon 
completion the homes are moved to a location where they are to be 
permanently located and occupied. Because these homes are designed to be 
easily moved from the manufacturing site to the permanent location, they 
are not originally built on a permanent foundation at the manufacturing 
site, but on a pair of parallel I-beam joists, and then the manufactured 
home is transported to and mounted upon piers, such as concrete blocks, 
pilings or stabilizing jacks, at a site where the home will be occupied. 
It is important that the home also be anchored in position on the piers, 
with the use of soil anchors and ties extending from the anchors to the 
framework of the home, so as to avoid the home being shifted off of its 
piers by strong winds or earth tremors. If a home is inadvertently shifted 
off of its piers, this can cause serious damage to the home and also can 
cause human injury. 
Various types of stabilizing devices have been used to stabilize the 
manufactured homes, to keep the homes from moving in response to wind 
forces and earth movement, such as guy wires, straps or other ties which 
connect the home to anchors or ground fixtures. A traditional approach to 
providing wind protection for manufactured homes consists of an anchor 
having a shaft with one or more helical plates at the bottom of the shaft 
which can be rotated to move into the earth, and cold-rolled steel 
strapping installed as diagonal ties between the upper exposed portion of 
the anchor and the lower main frame of the manufactured home. A system of 
this type is taught in U.S. Pat. No. 3,747,288. In addition, vertical or 
"over-the-top" ties may be installed in case of single-wide structures. 
The vertical support for manufactured homes usually is provided by piers, 
such as concrete masonry piers or prefabricated steel piers or precast 
concrete jack stands located under the parallel joists of the main frame 
of the manufactured home, with the vertical supports being spaced 
longitudinally along the parallel joists at approximately 8' from one 
another. The soil anchors usually are installed vertically or even with a 
slight back angle just inside the perimeter of the home. 
The portion of the anchor shaft of a typical soil anchor which is beneath 
and adjacent the surface of the soil has a relatively small surface area 
that contacts the soil. When the upper end of the anchor shaft is pulled 
laterally by a manufactured home being pushed by the wind, the upper 
portion of the anchor shaft usually is met with only small soil 
resistance, and the upper portion of the shaft tends to move through the 
soil and bend toward the manufactured home, allowing the home to move. 
Once the anchor has become bent toward the home, its resistance to 
horizontal movement increases. 
One way of increasing resistance to the movement of the upper shaft 
portions of soil anchors without bending the anchors has been to drive a 
large stabilizer plate into the soil adjacent the anchor and between the 
anchor and its home, which spreads the pulling force applied by the tie to 
the anchor over a larger area in the soil. 
Another way of increasing the resistance of the upper shaft portions of the 
soil anchors is to preload the anchor, by deliberately bending the upper 
ends of anchor shafts toward the home when the anchors are first installed 
so that the bending of the shaft will have been accomplished prior to the 
lateral forces being applied by the wind to the house. 
Test data for this type of installation have been developed, and the 
performance of traditional anchor systems have been reviewed. It was shown 
that the load capacity and stiffness of helix-plate soil anchors generally 
are far less than what is required to provide adequate resistance against 
the loads resulting from wind storms and acting on the diagonal ties and 
the piers. 
Based on extensive laboratory and field studies, the expectations for the 
performance of traditional anchoring systems are higher than the actual 
levels of resistance that the anchoring systems can reasonably be expected 
to provide. 
The large horizontal displacements required to bend the anchors and 
therefore develop acceptable levels of anchor resistance are incompatible 
with the much shorter horizontal displacement limits of the home which are 
needed to insure pier stability to support the home. 
Stabilizer plates and similar devices which are installed adjacent the head 
of a soil anchor exhibit low resistance and high variability to anchor 
head movement which makes them minimally effective for increasing the 
lateral resistance of soil anchors. 
The U.S. Department of Commerce, Department of Housing and Urban 
Development released a report, NISTIR 5664 entitled "Recommended 
Performance-Based Criteria for the Design of Manufactured Home Foundation 
Systems to Resist Wind and Seismic Loads," (August 1995). This report 
recommends that preloaded soil anchors be used. By preloading it is meant 
that the anchor is bent prior to use in the direction of the manufactured 
home until it resists a certain amount of force, typically 3,000 lbs. The 
tie extending between the anchor head and the lower frame of the home is 
then tightened. In particular, the pre-loading can produce a significant 
increase in anchor stiffness, thus eliminating the need for stabilizer 
plates and similar devices which have been shown to be somewhat 
ineffective. The limited test data that are available for cold-rolled 
steel strapping suggests an in-service ultimate capacity of about 16.9 kN 
(3,800 lbf). The factored diagonal tie load for a basic wind speed of 44.7 
m/s (100 mph) is 7.55 kN/m (518 lbf/ft), resulting in a maximum anchor 
spacing of 2.24 m (7.3 ft). However, at higher wind speeds the anchor 
spacing becomes so small that the cones of influence of the helix plate in 
the soil begin to overlap. Therefore, even with preloading, the 
traditional shallow anchor/tie/pier system is limited in application to 
basic wind speeds less than about 44.7 m/s (100 mph). 
What is needed, but apparently is not available, is a foundation 
stabilizing system for manufactured homes that provides improved 
resistance to horizontal movement as well as resistance to vertical 
displacement of the traditional soil anchor. 
SUMMARY OF THE INVENTION 
Briefly described, the present invention comprises a foundation for a 
manufactured home of the type that is mounted on piers, wherein the piers 
are supported by the ground and usually are arranged in pairs with the 
piers of each pair being aligned across the length of the home. The I-beam 
joists of the home are parallel to each other and extend along the length 
of the home and form part of the framework of the home. The I-beam joists 
rest on the pairs of piers positioned beneath the home, with the piers 
usually bearing the full weight of the home. In the situation where two 
home units are placed side by side to form a "double-wide" structure, 
there usually will be separate pairs of I-beams and piers for each home 
unit. 
The stabilizing foundation system includes soil anchors inserted into the 
ground at the side edge of the home and aligned with the pairs of piers to 
form an anchor-piers-anchor alignage. Outer stabilizer bars are positioned 
on the ground and extend between and abut the anchors and their adjacent 
piers. Ties connect the anchors to the lower frame of the manufactured 
home. Therefore, the anchor which penetrates the soil, a tie extending 
between the head of the anchor to the frame of the home, a pier supporting 
the home, a stabilizer bar having its ends in abutment with the anchor and 
the pier, and the weight of the home bearing upon the pier, all act in 
combination to resist movement of the home. The lateral force of the wind 
blowing against the home is resisted by the anchor and the tie, and the 
forces on the anchor applied by the tie are partially transferred by the 
stabilizer bar to the pier and movement of the stabilizer bar is resisted 
by the pier. 
In one embodiment of the invention, tie down shoes are positioned at the 
lower end of the piers and ties are connected to the tie down shoes and 
extend upwardly from the shoes over the I-beam joists of the framework of 
the home, and to an anchor or to another tie down shoe of the adjacent 
pier. The use of the tie down shoe and its ties assist in holding the home 
down in opposition to the lifting forces applied by the winds to the home, 
and resists lateral displacement of the piers from one another and from 
the associated anchors, and resists lateral displacement of the 
manufactured home. 
If desired, an intermediate stabilizer bar can be placed between the piers 
of a pair of piers so as to further resist the piers moving toward one 
another in response to wind forces and to transfer some of the lateral 
forces applied by the wind to the leeward anchor. 
One result of this structure is that the lateral wind forces applied to the 
manufactured home tend to increase the effective weight of the 
manufactured home on the piers beneath the home. The ties that extend from 
the anchors to the I-beam joists of the home and the ties that extend 
between the tie down shoes and the I-beam joists of the home are sloped 
upwardly from the anchors and tie down shoes so that when the lateral 
forces applied by the wind to the home tend to tighten the inclined ties, 
the angles of the ties cause the ties to pull the lower frame of the home 
downwardly against its piers. Further, the stabilizer bar which engages 
between each anchor and its adjacent pier keeps the anchor from moving 
toward the home structure, so that significant movement of the I-beam 
joist of the home structure is substantially avoided. 
Thus, it is an object of this invention to provide an improved foundation 
for a manufactured home which stabilizes the home against wind forces and 
earth movements. 
Another object of this invention is to provide a stabilized foundation 
system for manufactured homes which transfers at least a portion of the 
lateral wind force exerted upon the home from anchors on the windward side 
of the home to anchors on the leeward side of the home, thus providing the 
home with greater resistance to movement. 
A further object of this invention is to provide a stabilizing foundation 
system for manufactured homes that includes tie down shoes positioned at 
the lower portions of the piers of the home and diagonal ties connected 
between the tie down shoes, the frame of the home, and either to other tie 
down shoes or soil anchors, thereby providing increased resistance to 
lateral shifting of the home in response to lateral wind forces and earth 
movements. 
Another object of this invention is to provide an inexpensive stabilizing 
foundation system for manufactured homes, utilizing traditional soil 
anchors, wherein the pull-out forces applied to the anchors are maintained 
in an approximate vertical direction. 
Another object of the invention is to provide a foundation system for 
manufactured homes that uses both soil anchors and piers which support the 
home as anchors to which ties are connected for resisting lateral movement 
and uplift of the home due to wind forces. 
Another object of this invention is to provide a foundation system for 
manufactured homes which provides increased hold-down power to the home. 
Other objects, features and advantages of the present invention will become 
apparent upon reading the following specification, when taken in 
conjunction with the accompanying drawings.

DETAILED DESCRIPTION 
Referring now in more detail to the drawings, in which like numerals 
indicate like parts throughout the several views, FIG. 1 illustrates a 
foundation 10 for supporting a manufactured home 11. The manufactured home 
is constructed on a pair of parallel, horizontally extending I-beam joists 
12 and 14 at a manufacturing site (not shown). After the construction of 
the manufactured home has been completed, the manufactured home is then 
transferred to a permanent site illustrated in FIG. 1 where it is to be 
mounted on piers 16 and 18, where the home will be occupied. The piers 16 
and 18 have lateral sides, extend upright, and can be formed of steel, 
concrete, wood or other appropriate building material for the geographical 
site. 
When the manufactured home is to be mounted on its foundation, the home 
typically is placed directly over its site of erection and the foundation 
is constructed beneath the home, and the home is lowered to rest on its 
foundation. Cleated support plates 20-23 are placed beneath the I-beam 
joists 12 and 14 and are aligned with each other across the length of the 
joists. Typically, there will be a pair of support plates for each pier. 
The support plates have cleats 24 which extend downwardly from a 
horizontal platform 26, and the cleats penetrate the ground. The platform 
26 of each support plate provides a surface for supporting other elements 
of the foundation. The cleats inhibit any lateral shifting of the support 
plates. Stabilizer bars 28 and 30 are placed on the support plates 20-23, 
with stabilizer bar 28 placed on support plates 20 and 21 and stabilizer 
bar 30 placed on support plates 22 and 23. The stabilizer bars 28 and 30 
extend at a right angle with respect to the lengths of the I-beam joists 
12 and 14, and are approximately aligned with each other. 
Tie down anchors 32 and 34 are inserted in the ground at the outer ends of 
stabilizer bars 28 and 30 adjacent outer sides of the piers 16 and 18, 
with each tie down anchor including a shaft 35 which penetrates the 
ground, a helical blade 36 surrounding the lower end of the shaft 35, and 
a tensioning head 37 rigidly mounted to the upper end of the shaft 35 and 
positioned above the ground. The tensioning head is approximately U-shaped 
(FIG. 2), with slotted bolts 38 extending through aligned openings 40, 42 
in the tensioning head, so that ties can be inserted at their ends into 
the slots of the bolts and the bolts rotated to wind the ties about the 
bolts for tightening the ties. An anchor bracket 44 is mounted at the 
outer end of each stabilizer bar 28 with a U-bolt 46 rigidly mounting the 
anchor bracket to the outer end of the stabilizer bar, and orienting the 
sloped bifurcated skirt 48 of the anchor bracket into engagement with the 
shaft 35 of the tie down anchor. 
As illustrated in FIG. 1, the upright piers 16 and 18 are mounted on and 
are supported by the lateral stabilizer bars 28 and 30, respectively. The 
lower ends of the piers 16 and 18 are mounted to the stabilizer bars by 
tie down shoes 50 and 51, respectively. 
As illustrated in FIGS. 3-5, tie down shoes 50 each comprise a pair of 
identical plates 52 and 54 which are assembled on opposite sides of the 
pier 16 and connected together by slotted bolts 56, 57, 58 and 59. The tie 
down plates 52 and 54 each include an L-shaped connector tab 60 which is 
offset from the upper body portion 62 of the plate and which defmes square 
bolt receiving openings 64 which are aligned with similar bolt receiving 
opening of the opposing plate. The portion of the shafts of the bolts 
adjacent the heads of the bolts are square and are sized so as to fit into 
the square openings 64, so as to become non-rotatable with respect to the 
tie down shoes when the bolts are drawn fully into position in the plates 
by the nuts of the bolts. The slots 66 of the bolts receive the ties of 
the foundation, and the ties can be spirally wound around the bolts by 
rotating the bolts before the squared shanks of the bolts are drawn fully 
into the square openings 64. 
The lower body portions 68 of the plates 52 and 54 of the tie down shoes 50 
extend beneath and laterally beyond the upper body portions 62. U-bolts 70 
and 72 (FIG. 1) connect the ground support plates 20-24 to the protruding 
ends of the lower body portion 68 of the tie down shoes 50. With this 
arrangement, the tie down shoes are firmly connected to the stabilizer 
bars 28 and 30 and to the piers 16 and 18 and to the cleated ground 
support plates 20-23, thereby firmly connecting the piers 16 and 18 to the 
stabilizer bars 28 and 30 and to the ground. 
As illustrated in FIG. 1, pier plates 74 are placed on the upper ends of 
piers 16 and 18, beneath the I-beam joists 12 and 14 of the manufactured 
home. As illustrated in FIG. 6, the pier plates 74 each include a platform 
which is placed on top of the pier and beneath the joist, downwardly 
turned locating tabs 78 and 80 which extend from the intermediate portions 
of opposite sides of the platform 76, and upwardly turned locating tabs 
81, 82, 83 and 84 which are positioned at the ends of the sides of the 
platform 76, straddling the downwardly turned tabs 78 and 80. This forms 
slots 86 and 87 above each of the downwardly turned tabs 78 and 80, 
between the upwardly turned tabs 81-84. Upwardly extending parallel ribs 
88 and 89 extend across platform 76 between the upwardly turned locating 
tabs 81 and 84 and 82 and 83 respectively. 
When the I-beam joist 12 or 14 is placed on the pier plate 74, the ribs 88 
and 89 maintain a small space between the lower surface of the I-beam 
joist 12 or 14 and the pier plate, and ties 104, 108 of FIG. 1 are passed 
beneath the I-beam joist and over the pier plate. 
As illustrated in FIG. 1, a plurality of ties are connected at their ends 
to the tie down anchors 32 and 34, and to the tie down shoes 50 and 51. In 
order to distinguish the ties from one another, some of the ties are shown 
in dash lines. 
As illustrated in FIG. 1, anchor tie 101 is connected at one end to tie 
down anchor 32 and slopes upwardly from the tie down anchor at 
approximately 45.degree., and passes over the I-beam joist 12, and then 
extends downwardly to the tie down shoe 50, where it is connected to the 
upper bolt 58a. The anchor tie 101 is tightened by rotating the slotted 
bolt 38 (FIG. 2) and locking the bolt in the square-shaped opening of the 
tensioning head of the anchor. 
Shoe tie 102, illustrated in dash lines, is connected at one end to slotted 
bolt 57a of tie down shoe 50 and extends upwardly over I-beam joist 12, 
and then slopes downwardly to tie down shoe 51 where it is connected at 
its other end to slotted bolt 57b of the tie down shoe 51. 
Another shoe tie 104 is connected at one end to slotted bolt 56a, extends 
upwardly over pier 16 and its pier plate 74 and then slopes downwardly for 
connection at its other end to the extension 29 of the stabilizer bar 28, 
and is connected there by U-bolt 105. 
Shoe tie 106 is connected to slotted bolt 59a and is sloped upwardly from 
tie down shoe 50, extending over I-beam joist 14, and then downwardly from 
joist 14 and is connected at its lower end to slotted bolt 58b. 
Shoe tie 108 is connected at one end to U-bolt 109 on extension 31 of 
stabilizer bar 30, slopes upwardly from U-bolt 109 and passes over pier 18 
and its pier plate 74, then extends downwardly for connection to slotted 
bolt 59b. 
Anchor tie 110 is connected at one end to tie down anchor 34, and slopes 
upwardly from the tie down anchor, over I-beam joist 14, and then extends 
downwardly for connection to slotted bolt 56b of tie down shoe 51. 
All of the ties 101, 102, 104, 106, 108, and 110 are tightened by rotating 
their slotted bolts, in a conventional manner. 
As shown in FIG. 4, the slotted bolts on opposite sides of the tie down 
shoes 50 and 51 are offset from each other. This permits the ties to pass 
each other without intersecting each other. Moreover, as shown in FIG. 6, 
the slots 86 and 87 of the pier plates are wide enough so as to 
accommodate ties from either side of the tie down shoes. 
When the foundation is assembled and the home is mounted on the foundation 
as illustrated in FIG. 1, and a force, such as wind force 115 is applied 
to the manufactured home 11, the following functions will be performed by 
the foundation. The home 11 tends to shift in the direction of the wind 
115, which is from right to left in FIG. 1. The I-beam joists 12 and 14 
tend to move with the home. Tie 110 that extends between anchor 34, over 
I-beam joist 14, and downwardly to the tie down shoe 51 tends to stretch 
and pull tie down anchor 34 in the direction of the tie, sloped upwardly 
from the anchor. The left movement of the tie down anchor 34 is resisted 
by the inherent strength of the anchor being partially buried in the 
earth, and also resisted by the stabilizer bar 30. Since the dead weight 
of the home 11 rests on pier 18, and since pier 18 is mounted on the 
stabilizer bar 30, and since the stabilizer bar 30 is locked by the 
U-bolts 70 and 72 to the cleated ground support plates 22 and 23, there 
will be no lateral yielding of the stabilizer bar in response to the 
forces applied to it by the tie down anchor 34, and therefore the abutment 
of the anchor against the outer end of the stabilizer bar 30 avoids 
lateral movement of the tie down anchor 34. Therefore, the lateral 
movement of the I-beam joist 14 is resisted. 
The present invention also provides increased resistance to vertical 
displacement of the tie down anchors 32 and 34 and therefore avoids 
lifting of the manufactured home. The stabilizer bars 28 and 30 abut the 
anchors so as to prevent the anchors from bending toward the piers in 
response to wind forces applied against the side of the manufactured home. 
Therefore, the pull-out force on the soil anchors must be applied in an 
approximate vertical direction, parallel to the shafts of the anchors, the 
stabilizer bars position the tie down anchors in an effective preloaded 
geometry. Therefore, the entire cone of influence 33 of each anchor in the 
soil is utilized in preventing vertical pull-out of the anchor. The 
present invention allows preloading of the anchors without bending the 
anchor shafts, which simplifies the installation of the foundation, and 
which provides a predictable limitation on the potential lateral movement 
of the tie down anchors in response to wind forces applied to the 
manufactured home. 
Moreover, the invention uses "dynamic forces" of the manufactured home to 
increase the horizontal support of the home as the wind load increases on 
the windward side of the home. For example, the sloped anchor ties 101 and 
110 resist horizontal movement and vertical movement of the home. As the 
horizontal wind load increases, downward vertical force applied to the 
I-beam joists by the sloped tie is increased because of the slope of the 
ties extending downwardly from the joists back in the direction of the 
wind. For example, assuming that the angle A between the anchor tie 110 
and the horizontal is 45.degree., a 1000 lb. horizontal force on the 
anchor tie 110 will generate approximately 700 lb. of downward vertical 
force on the I-beam joist 14 so as to offset the lifting force applied by 
the wind. This downward vertical force will increase as the angle of the 
anchor tie 110 increases. For example, if the anchor tie 110 is connected 
at 60.degree. from the horizontal, a 1000 lb. horizontal wind load will 
result in 866 lb. of downward vertical force. This is calculated as: cos 
60.degree..times.1000 lb=866 lb. 
Likewise, if the angle B between the shoe tie 102 and the horizontal is 
45.degree., a 1000 lb. horizontal wind load on the shoe tie 102 will 
result in over 700 lb. of downward vertical force on I-beam joist 12. Of 
course, in both instances, the dead weight of the home 11 would be added 
to the downward force. 
In the instance where the home 11 tends to slightly shift laterally in 
response to the wind force 115, pier 16 would be further stabilized by 
shoe tie 104. For example, if the angle C between the shoe tie 104 and the 
horizontal is 60.degree., a 1000 lb. additional tension in shoe tie 104 
would result in an additional downward force in the amount of 500 lb. This 
is calculated as: sin 60.degree..times.1000 lb=500 lb. 
Stabilizer bars 28 and 30 are anticipated to be of rugged stock, such as 
4.times.4 wooden beams which are suitable for withstanding compression 
forces applied by the tie down anchors 32 and 34 and by the piers 16 and 
18. Therefore, the stabilizer bars function as lateral compression members 
in resisting the movement of the tie down anchors. Of course, other 
compression members might be used, such as metal beams, pipes, concrete 
slabs, and other items suitable to withstand the compressive forces 
applied by the tie down anchors and the piers and other elements of the 
foundation. 
FIG. 7 demonstrates the use of double anchor ties 120 and 121 in the 
foundation system. The anchor tie 120 is looped about slotted bolt 58a, 
and it is passed in double lengths over the top of I-beam joist 12, and 
its ends are fastened in the slots of the slotted bolts 38 of the tie down 
anchor 123. The doubling of the tie at the anchor 123 allows the tie to 
withstand substantially twice the load of a single tie. The use of the 
stabilizer bar 128 to buttress the tie down anchor 123 causes the anchor 
to increase its resistance to movement without increasing the structure of 
the anchor. Further, the near vertical attitude of the anchor 123 
maximizes the amount of vertical resistance applied through its cone of 
influence 124. 
Another feature of FIG. 7 is that the stabilizer bar 126 can extend 
completely from one side to the other side of the manufactured home, so 
that a single stabilizer bar is utilized. Thus, if more lateral forces are 
applied to one I-beam joist than to the other, the single stabilizer bar 
will receive substantially all of the lateral shifting forces, so that, 
for example, the forces applied by the windward anchor to the stabilizer 
bar will be transmitted directly through the stabilizer bar to the leeward 
anchor, thereby causing the leeward anchor to resist some of the lateral 
forces. 
FIG. 8 of the drawings illustrates another embodiment of the invention, 
wherein an intermediate stabilizer bar 125 is positioned in end abutment 
with piers 126 and 128. Outer stabilizer bars 130 and 132 are in end 
abutment with piers 126 and 128, and tie down anchors 134 and 136. The 
ends of the stabilizer bars 125, 130 and 132 which are adjacent piers 126 
are connected by U-bolts to the cleated ground support plate 138, 139, 140 
and 141. A double anchor tie 144 is connected to intermediate stabilizer 
bar 125, about a U-bolt clamp 146, and extends up at a sloped angle of 
approximately 45.degree. upwardly over I-beam joist 148, and then extends 
at a sloped angle downwardly so that its ends are connected to tie down 
anchor 134. Preferably, the angles D and E which are formed between the 
sloped runs of the tie 144 with respect to the horizontal are 45.degree.. 
Likewise, the double tie 154 extends from its U-bolt 156 which is rigidly 
mounted to the intermediate stabilizer bar 125, sloped upwardly over the 
I-beam joist 158, then slopes downwardly and is connected at its ends to 
the tie down anchor 136. Again, the preferred angles F and G formed 
between the sloped runs of the tie 154 and the horizontal are 45.degree.. 
In an example of how the foundation of FIG. 8 functions, it will be assumed 
that a dead vertical load in the amount of 3000 lbs. is applied by the 
manufactured home 162 to the pair of piers 126 and 128, as indicated by 
arrow 160. If a wind force in the amount of 6000 lbs. is applied laterally 
to the home 162 as indicated by arrow 164, the horizontal movement of the 
home 162 will be restrained by the sloped anchor ties 144 and 154. If 
angles D and G are the same, the lateral load applied to each of the 
anchor ties 144 and 154 will be one-half of the 6000 lb. lateral wind 
force, which is 3000 lbs. for each anchor tie. If angles D and G are both 
45.degree., the force that must be resisted by the ties 144 and 154 will 
be 4243 lbs. for the double straps, or one-half that for each run of the 
double straps. This is calculated as: cos 45.degree.=3000 lbs/Y. This same 
calculation applies to anchor tie 154, assuming its angle G is also 
45.degree.. 
In addition, the wind load of 3000 lbs. for each pier 126 and 128 will 
result in an additional downward force being asserted by the anchor ties 
144 and 154 through the pier 126 in the amount of 2121 lbs. (SIN 
45.degree.=x/4243 lbs). This assists the dead load 160 in retaining the 
manufactured home 162 on the ground during a wind storm. 
As with the previous embodiments of the invention, the stabilizer bars 125, 
130 and 132 maintain the tie down anchors 134 and 136 in their originally 
installed positions, with little likelihood that the anchors will bend 
toward I-beam joists 148 and 158 under the influence of the pulling forces 
of anchor ties 144 and 154. Likewise, the U-bolts 146 and 156, being 
rigidly mounted to intermediate stabilizer bar 125, are immovable along 
the length of the stabilizer bar, so that the tension applied to the ties 
144 and 154 by the rotation of the slotted bolts in the tie down anchors 
134 and 136 will not be lost in response to any movement of the 
manufactured home 162 in response to the wind force 164. The cones of 
influence 170 will be effective to retain the anchors 134 and 136 in the 
ground, in spite of the lateral forces being applied to the upper ends of 
the anchors. 
While preferred embodiments of the invention have been disclosed in detail 
in the foregoing description and drawings, it will be understood by those 
skilled in the art that variations and modifications thereof can be made 
without departing from the spirit and scope of the invention as set forth 
in the following claims.