Mechanical connection of all steel piers or concrete piers to an MH-unit and to the pier's footing is subject to the requirements of this section.
(a) When live loads are applied to an MH-unit installed pursuant to Health and Safety Code section 18613, mechanical connection of steel piers or concrete piers shall be capable of maintaining the placement of the support system of the MH-unit to the point of the failure of either the attachment point on the MH-unit, the pier or the footing.
(1) The means of mechanical connection shall not allow the separation of the MH-unit from any pier or footing as a result of horizontal loads or vertical loads,
(2) Failure occurs when the attachment point on the MH-unit, the pier or the footing yields or fractures or is deformed to a point that threatens the health and safety of the occupants of the MH-unit.
(b) For the purposes of this section, live loads are restricted to the following:
(1) horizontal loads applied to the attachment point on the MH-unit in both directions parallel to the attachment point and in both directions perpendicular to the attachment point; and
(2) vertical loads applied to the attachment point on the MH-unit in both directions upward and downward from the point of contact between the pier footing and the ground.
(c) Mechanical connection of the concrete pier or steel pier to the point of attachment on the MH-unit shall comply with the following requirements:
(1) The means of mechanical connection shall be fabricated of steel that is not less than one-eighth ( ⅛ ) of an inch thick and not less than two (2) inches wide and two (2) inches long;
(2) Fasteners incorporated as part of the mechanical connection shall be no smaller than three-eights ( ⅜ ) inch grade 5 bolts, nuts and lock washers; and
(3) The means of mechanical connection shall not incorporate modifications of either the pier or of the MH-unit.
(4) The means of mechanical connection at the center line between each transportable section of a multi-section MH-unit shall consist of one quarter ( ¼ ) inch lag bolts or wood screws and shall secure the pier to a wood floor structural member.
(d) A listed concrete pier or steel pier complies with subsection (c) if it incorporates into its structure a means of mechanical connection to the MH-unit.
(e) Mechanical connection of a concrete pier or steel pier to the pier's footing shall be fabricated of corrosion resistant components.
(f) A listed concrete pier or steel pier complies with subsection (e) if it incorporates into its structure a means of mechanical connection to the pier footing.
Credits
Note: Authority cited: Sections 18300, 18613 and 18613.4, Health and Safety Code. Reference: Section 18613.4, Health and Safety Code.
1. Renumbering of former section 1336.4 to new section 1334.1, including amendment of section and Note, filed 7-6-2004; operative 7-6-2004 pursuant to Government Code section 11343.4 (Register 2004, No. 28).
This database is current through 5/10/24 Register 2024, No. 19.
Cal. Admin. Code tit. 25, § 1334.1, 25 CA ADC § 1334.1
