§ 1334. MH-Unit Support Piers and Footings.
25 CA ADC § 1334Barclays Official California Code of Regulations
25 CCR § 1334
§ 1334. MH-Unit Support Piers and Footings.
(a) Load bearing piers shall be constructed of rust resistant materials or treated to resist rust. The required load bearing capacity of individual support piers and their footings shall be calculated at not less than a combined live and dead load of seventy-five (75) psf based on roof live and dead load of twenty-five (25) psf and floor live and dead load of fifty (50) psf of the MH-unit.
(b) Load bearing piers, other than concrete block piers, shall be tested to determine the safe operating load. The tests shall be conducted by testing agencies approved by the department. Testing agencies shall provide a pier testing report to the department upon completion, regardless of the testing results. A unique number provided by the testing agency shall identify each test report. The following testing procedures shall be used:
(B) The selected piers shall be subjected to the compression test with each pier, fully assembled as will be installed, placed squarely on a firm base, and tested to its failure point. The compression test shall be measured in psf. Support pier failure will be established when the support bends, cracks, buckles or deflects to an unsafe level as determined by the approved testing agency.
(d) Individual load bearing footings may be placed on the surface of the ground, and shall be placed level on cleared, firm, undisturbed soil or compacted fill. Where unusual soil conditions exist, as determined by the enforcement agency, footings shall be designed to compensate for such conditions. The allowable loading on the soil shall not exceed one thousand five-hundred (1,500) psf unless data to substantiate the use of higher values is approved by the enforcement agency.
Individual footings for load bearing supports or devices shall consist of one of the following:
Nom. Width | Any Location | Holes (Any Cause) | |
6″ | 2 ⅜ ″ | 1 ½ ″ | |
8″ | 3″ | 2″ | One Hole or |
10″ | 3 ¾ ″ | 2 ½ ″ | Equivalent |
12″ | 4 ¼ ″ | 3″ | Per Piece |
14″ | 4 ⅝ ″ | 3 ½ ″ |
(f) Individual load bearing piers or devices and footings shall be designed and constructed with sufficient rigidity and bearing area to evenly distribute the loads carried over one-third ( ⅓ ) the area of the footings as measured from the center of the footing. When two (2) or more two (2)-inch nominal wood pads placed side-by-side on the ground are used as a pier footing, a single wood cross pad must be installed on top of the ground contact pads at a ninety (90)-degree angle so as to place the directional wood grains opposing to each other. The cross pad must be of a length to cover each ground contact pad and be of two (2) inch nominal thickness. Footings shall be constructed of sufficient rigidity to evenly distribute the loads carried to the ground without bowing or splitting.
(i) When more than one-quarter ( ¼ ) of the area of the MH-unit is supported at a height of three (3) feet or more as measured between each unit's chassis and the ground, the MH-unit shall be installed on a foundation system in accordance with sections 18551 (a) or (b) of the Health and Safety Code.
Credits
Note: Authority cited: Sections 18300 and 18613, Health and Safety Code. Reference: Sections 18300 and 18613, Health and Safety Code.
History
1. Amendment of subsection (a) filed 8-22-85; effective upon filing pursuant to Government Code Section 11346.2(d) (Register 85, No. 36).
2. Amendment of section heading and section filed 7-6-2004; operative 7-6-2004 pursuant to Government Code section 11343.4 (Register 2004, No. 28).
3. Amendment of subsections (a), (d) and (i) filed 2-18-2011; operative 2-18-2011 pursuant to Government Code section 11343.4 (Register 2011, No. 7).
This database is current through 5/10/24 Register 2024, No. 19.
Cal. Admin. Code tit. 25, § 1334, 25 CA ADC § 1334
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