19 Miss. Code. R. 7-5.06.10.5 - Tie-down Spacing and Sizes
The following specifications are the minimum standards for all tie-down spacing and sizes.
A.
Over the top tie-downs shall be positioned at stud and rafter locations near
each end of the Factory-Built home. Others, if needed, may be positioned
between them.
B. A metal roof
protector must be used with over-the-roof tie down straps.
C. Wherever feasible, over the top tie-downs
and frame ties directly beneath them may use the same anchors.
D. All vertical side wall and shear wall tie
down buckles existing on the home must be properly strapped and anchored.
E. All tie-down straps, cables and
devices must be tested and approved. All ties shall be fastened to ground
anchors and drawn tight with turnbuckles, yoke type fasteners or other such
tensioning devices listed with the ground anchor.
F. All tie-down straps and devices must be
attached to the Factory-Built home in accordance with the manufacturer's
instructions for the specific types of straps and devices. All tie-down straps
and devices must be tested and approved. Straps must be type I, finished B,
grade 1 steel strapping, 1 1/4" wide and 0.035" thick conforming with Federal
Specifications strapping steel and seals FS QQ-S-781H-1974.
G. Tie down straps shall not be kinked or
bent or otherwise abnormally stressed when installed. Straps must not be in
contact with the support piers.
H.
The angle of the diagonal tie down strap shall not exceed 45 degrees between
the strap and the ground. If the angle exceeds 45 degrees an additional strap
must be installed and attached to the opposite support frame.
I. All straps must be properly attached to
the anchor head according to the manufacturer's installation instruction and
properly tensioned. According to manufacturer specifications, the winding of
the strap on the anchor head bolt must contain a minimum of four to five
complete turns.
J. Splices in the
anchor straps must be installed in accordance with the manufacturer's
instructions for straps and devices. If manufacturer instructions for splicing
anchor straps are not available, the following instructions will apply. The
ends of the straps must overlap a minimum of 6 inches and a maximum of 12
inches. Two (2) crimp seals must be installed in the overlap of the strap ends
and each crimp seal must be double crimped.
K. Cables shall be either 7/32 inch diameter
or greater (7x7) steel cable or 1/4 inch diameter or greater (7x19) aircraft
cable. All cable ends shall be secured with at least two U bolt type cable
clamps or other fastening device as approved by the building official.
L. Tie materials shall be capable
of resisting an allowable working load of 3 , 1 5 0 lbs. with no more than 2%
elongation and shall withstand a 50% overload [4,725 lbs. total]. Tie- downs
exposed to weathering shall be resistant to weathering deterioration at least
equivalent to that provided by a coating of zinc on steel of not less than 0.30
oz. per square foot of surface coated. Type I,
M. Class B, Grade I, steel strapping 1 1/4
inches wide and 0.035 inch thick, conforming to Federal Specifications QQ S 781
F, is judged to conform to this section.
N. Materials used for ties must terminate
with D-rings bolts, or other fastening devices, which will not cause distortion
of the band or reduce its breaking strength of 4,725 lb. Please note that ties
should be double wrapped (double looped) at top of beam, not at the bottom.
O. Connection of the cable frame
tie to the I-beam (or other shape) main structural frame member should be by a
5/8 inch drop forged closed eye bolted through a hole drilled in the center of
the I-beam web. A washer, or equivalent, shall be used so that the beam is
sufficiently reinforced around the hole. If steel strap ties are used, care
should be exercised to insure that minimum bending radius is adhered to so that
the breaking strength of the strap is not reduced.
P. Frame ties shall connect the anchor and
the steel I-beam (or other shape) main structural frame member which runs
lengthwise under the Factory-Built home. Frame ties shall never be connected to
any of the steel outrigger beams which fasten to and intersect the main I beam
at right angles.
Q. Ground anchors
should be aligned with center of piers. Also, they should be situated
immediately below the outer wall to accommodate over the top ties as well as
frame ties.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.