DR8902-CS 890322
2907 UNIFORM BUILDING CODE
::~ slope drainage, erosion and shallow failures. Except as provided for in Subsection
~:i:: 6 of this scctiou and Figure No. 2%1. the following criteria will be assumed to
::~: provide this protection. Where tile existing slope is steeper than 1 horizontal to 1
::: vertical, the toe of thc slope shall be assumed to be at the intersection of a
i'. horizontal plane drawn from the top of the foundation anti a plane drawn tangent to
:: the slope at an angle of 45 degrees to the horizontal. Where a retaining ,,,.:all is
constructed at the toe of the slope, the height of thc slope shall be measured from
the top of the wall to the top of the slope.
3. Footing setback from descending slope surface. Footing on or adjacent to
slope surfaces shall be founded in firm material with an cmbedmcnt and setback
from the slope surface sufficient to provide vertical and lateral support for thc
footing without detrimental settlement. Except as provided for in Subsection 6 of
this section and Figure No. 29-1. the following setback is deemed adequate to
ii!ii meet the criteria. Where the slope is steeper than I horizontal to I vertical, tile
required setback shall be measured from an imaginary plane 45 degrees to the
~' horizontal, projected upward from the toe of thc slope.
4. Pools. The setback between pools regulated by this code and slopes shall be
: equal to one half the building footing setback distance required by this section.
"That portion of thc pool wall within a horizontal distance of 7 feet from thc top of
the slope shall be capable of supporting the water in thc pool without soil support.
5. Foundation elevation. On graded sites, the top of any exterior foundation
.~ shall extend above the elevation of the street gutter at point ofdischarge or the inlet
':: of an approved drainage device a minimum of 12 inches plus 2 percent. The
'~ building official may approve alternate elevations, provided it can be demon-
~:~ strated that required drainage to the point ofdischarge and away from the structure
~ is provided at all locations on the site.
!i 6. Alternate setback and clearauce. The building official may approve
~. alternate setbacks and clearances. Thc building official may require an investiga-
te:.. tion and recommendation of a qualified engineer to demonstrate that thc intent of
~: this section has been satisfied. Such an investigation shall include consideration
~. of material, height of slope, slope gradient, load intensity and erosion ct)aractcris-
~'. tics of slope material.
(.c) Footing Design. Except for special provisions of Section ~909 covering the
design of piles, all portions of footings shall be designed in a4cordancc with the
structural provisions of this code and shall be designed to minimize differential
setlle~nent.
If) Foundation Plates or Sills. Foundation plates or sills shall be bolted to thc
foundation or foundation wall with not less than V2-inch nominal diameter steel
bolts embedded at least 7 inches into thc concrete or reinforced masonry or 15
inches into unreinforced grot,ted masonry and spaced not more tha,~ 6 feet apart.
There shall be a minimum of two bolts per piece with one bolt located within 12
inches of cach end of each piece. Foundation plates a,ld sills shall be Ihe kind of
wood specified in Section 2516
~g) Designs Employing Lateral Bearing. 1. General. Construction employ-
lng posts or poles as columns embedded in earth or embedded in concrclc footings