Ala. Admin. Code r. 535-X-13-.09 - Standards For The Manufacture Of Anchor And Tiedown Devices
(1) All
manufacturers of ground anchors and tiedown devices must have the approval of
their products by the Alabama Manufactured Housing Commission before offering
their products for sale and use within the State of Alabama.
(2) All anchors and tiedown devices used in
the State of Alabama for the purpose of anchoring a manufactured home or
building to the ground must be tested by a third party independent testing
agency, recognized by the Commission as having the technical background and
experience in testing ground anchors and tiedown devices. The third party
agency cannot have any interest or ties with the manufacturer which the agency
is testing. There can be no conflict of interest between the agency and the
manufacturer.
(3) All anchors and
tiedown devices shall be tested to a minimum of 4,725 lbs. The combined
vertical displacement attributed to the elongation of the anchor and withdrawal
from the substrate shall not exceed 2" at an applied load of 4,725 lbs. Anchors
tested with loads applied at an angle to the anchor shaft shall not displace
the anchor more than 3" horizontally at an applied load of 4,725 lbs.
(4) Anchors designed for connection of
multiple ties must be capable of resisting the combined loads placed upon such
anchors. The displacement cannot exceed 2" vertically and 3"
horizontally.
(5) All tiedown
devices shall be tested with the same loads as the ground anchors. Failure of
the tiedown devices and ground anchors shall be considered as breakage, bending
or slippage that results in excessive yielding at 2" vertically and 3"
horizontally at an applied load of 4,725 lbs. or with combined loads.
(6) A complete product description shall be
provided for each anchor and each tiedown device tested and submitted for
approval. The information shall include the following:
(a) Manufacturer and model identification:
Each model shall show model identification and shall be permanently marked
indicating the conditions under which such anchor or device has been approved.
For traceability, the identification marks of all anchors, components, straps,
and devices used for anchoring and tying down manufactured homes must be
visible after the anchor or device is installed.
(b) Detailed drawings including all
dimensions (i.e. shaft, flute, head, etc.)
(c) Grade of steel or complete description of
material used for anchor.
(d)
Methods of securing tiedown device to the anchor.
(e) Methods of securing device to home
including all buckles, crimps and bolts required.
(f) Method of installing anchor in
ground.
(g) Special requirements
for protecting the anchor against frost heave where applicable.
(h) A written detailed description of the
quality assurance program and its procedures. The program shall include areas
of material compliance and dimensional adherence to the engineered drawings,
traceability of incoming raw materials, control of manufacturing methods,
random and individual inspection of finished goods, and periodic testing to
assure 95-98 percent compliance to program standards. Periodic test results are
to be filed with the Commission office.
(i) Drawings shall bear the seal of a
registered engineer (structural-mechanical) registered in the state of
manufacture or the State of Alabama.
(j) Each model must be field tested and
certified for holding power in the bottom half of the soil classifications
adopted by the Commission. All tests must be conducted with representatives of
the Alabama Manufactured Housing Commission present when the tests are
performed.
(7) Any
change from the engineered drawings (metal size, welding alterations, coatings,
etc.) as well as significant changes in the quality assurance program will
nullify the approval.
(8) A test
report is required to accompany each anchor or tiedown device submitted for
approval and shall be sufficiently detailed so that the test can be replicated
without a requirement for additional information. The test report shall include
the following:
(a) Description of anchor and
tiedown devices and components used in the test (i.e. buckles, hooks, bolts,
crimps, straps and etc.)
(b) Date
of tests.
(c) Description or
classification of soil type in which anchor was tested. Tests must be conducted
for all soil types within the State of Alabama.
(d) Location of tests.
(e) Embedment depth of the anchor.
(f) Minimum distance that ground anchors
shall be separated so that the capacity of the anchors will not be
reduced.
(g) The application and
orientation of the applied load on the anchor.
(h) The report shall detail the applied load
at 10 second intervals and 500 lb. increments. The test report shall identify
the vertical and horizontal displacements at each increment and describe the
mode and location of failure.
(9) All test procedures should conform to the
applicable ASTM Standards:
Author: Jim Sloan
Notes
Statutory Authority: Code of Ala. 1975, ยงยง 24-4A-3, 24-5-31, 24-5-32, 24-6-4.
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