rn-2011-00342_0004 (2).jpg APPENDIX E
SECTION AE506 3. A cast -in -place concrete pier with concrete having speci-
EXITS fied compressive strength at 28 days of 2,500 psi (17 225
AE506.1 Site development. Exterior stairways and ramps kPa)
which provide egress to the public way shall comply with Alternate materials and methods of construction may be
applicable provisions of this code. used for piers which have been designed by an engineer or
AE506.2 Accessory buildings. Every accessory building or architect licensed by the state to practice as such.
portion thereof shall be provided with exits as required by this Caps and leveling spacers may be used for leveling of the
code. manufactured home. Spacing of piers shall be as specified in
the manufacturer's installation instructions, if available, or by
an approved designer.
SECTION AE507
OCCUPANCY, FIRE SAFETY AND ENERGY
CONSERVATION STANDARDS SECTION AE603
AE507.1 General. Alterations made to a manufactured home HEIGHT OF PIERS
subsequent to its initial installation shall conform to the occu- AE603.1 General. Piers constructed as indicated in Section
pancy, fire- safety and energy conservation requirements set AE602 may have heights as follows:
forth in the Manufactured Home Standards. 1. Except for corner piers, piers 36 inches (914 mm) or less
in height may be constructed of masonry units, placed
with cores or cells vertically. Piers shall be installed with
SECTION AE600 their long dimension at right angles to the main frame
SPECIAL REQUIREMENTS FOR member they support and shall have a minimum
FOUNDATION SYSTEMS cross - sectional area of 128 square inches (82 560 mmz).
AE600.1 General. Section AE600 is applicable only when Piers shall be capped with minimum 4 -inch (102 mm)
specifically authorized by the building official. solid masonry units or equivalent.
2. Piers between 36 and 80 inches (914 mm and 2032 mm)
in height and all corner piers over 24 inches (610 mm) in
SECTION AE601 height shall be at least 16 inches by 16 inches (406 mm
FOOTINGS AND FOUNDATIONS by 406 nun) consisting of interlocking masonry units
AE601.1 General. The capacity of individual load - bearing and shall be fully capped with minimum 4 -inch (102
piers and their footings shall be sufficient to sustain all loads min) solid masonry units or equivalent.
specified in this code within the stress limitations specified in 3. Piers over 80 inches (2032 mm) in height may be con -
this code. Footings, unless otherwise approved by the building structed in accordance with the provisions of Item 2
official, shall be placed level on fiim, undisturbed soil or an engi- above, provided the piers shall be filled solid with grout
neered fill which is free of organic material, such as weeds and and reinforced with four continuous No. 5 bars. One bar
grasses. Where used, an engineered fill shall provide a minimum shall be placed in each corner cell of hollow masonry unit
load - bearing capacity of not less than 1,000 psf (48 kN /mz). piers or in each comer of the grouted space of piers con -
Continuous footings shall conform to the requirements of this structed of solid masonry units.
code. Section AE502 of these provisions shall apply to footings 4. Cast -in -place concrete piers meeting the same size and
and foundations constructed under the provisions of this section. height limitations of Items 1, 2 and 3 above may be sub-
stituted for piers constructed of masonry units.
SECTION AE602
PIER CONSTRUCTION SECTION AE604
AE602.1 General. Piers shall be designed and constructed to ANCHORAGE INSTALLATIONS
distribute loads evenly. Multiple section homes may have con- AE604.1 Ground anchors. Ground anchors shall be designed
centrated roof loads which will require special consideration. and installed to transfer the anchoring loads to the ground. The
Load - bearing piers may be constructed utilizing one of the load- carrying portion of the ground anchors shall be installed
methods listed below. Such piers shall be considered to resist to the full depth called for by the manufacturer's installation
only vertical forces acting in a downward direction. They shall directions and shall extend below the established frost line into
not be considered as providing any resistance to horizontal undisturbed soil.
loads induced by wind or earthquake forces.
1. A prefabricated load- bearing device that is listed and Manufactured ground anchors shall be listed and installed in
accordance with the terms of their listing and the anchor manu-
labeled for the intended use. facturer's instructions and shall include means of attachment of
2. Mortar shall comply with ASTM C 270 Type M, S or N; ties meeting the requirements of Section AE605. Ground
this may consist of one part portland cement, one -half anchor manufacturer's installation instructions shall include
part hydrated lime and four parts sand by volume. Lime the amount of preload required and load capacity in various
shall not be used with plastic or waterproof cement. types of soil. These instructions shall include tensioning
2009 INTERNATIONAL RESIDENTIAL CODE 781