Mississippi Administrative Code › Title 19 - Department of Insurance › Part 7 - State Fire Marshal › Chapter 5 - (MH-5) Uniform Standards Code For Factory-Built Homes Law. (10/16/2009) › Rule 19-7-5.06 - Installation Standards For Used Factory-Built Homes › Section 19-7-5.06.10 - Tie-downs › Section 19-7-5.06.10.5 - Tie-down Spacing and Sizes

Current through June 25, 2024
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 ¼" 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.
Miss. Code Ann.
						§§
												75-49-1,
						et seq.; 75-49-11 (Supp. 2015).