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HomeMy WebLinkAbout329ORDINANCE NO. 329 AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF IRWINDALE AMENDING THE BUILDING CODE RELATING TO GRADING, LOCATION OF BUILDINGS AND SWIMMING POOLS IN RELATION TO SLOPES, FLOOD HAZARDS AND GEOLOGIC HAZARDS. THE CITY COUNCIL OF THE CITY OF IRWINDALE DOES ORDAIN AS FOLLOWS: SECTION 1. Section 104(i) of the Building Code, adopted January 26, 1978, is amended by adding a paragraph to read: Drainage structures, devices or systems required by Chapter 70, "Excavation and Grading", shall be maintained in a manner that will insure their effectiveness. SECTION 2. Section 301(d) of said Building Code is amended by adding a paragraph to read: Where proposed construction will affect site drainage, existing and proposed drainage patterns shall be shown on the plot plan. SECTION 3. Section 304(a) of said Building Code is amended by adding a paragraph to read: Prior to plan check of building plans for lots or parcels in areas having slopes of five horizontal to one vertical (5:1) or steeper, a site inspection shall be made. The fee for such in- spection shall be as set forth in Section 303(f). The building official may waive this inspection and fee when he determines that the nature of the work does not require preinspection of the building site. Such a preinspection shall not be required for a building pad graded under the provisions of Chapter 70. SECTION 4. Section 308(a) of said Building Code is amended by adding a sentence after the third sentence to read: The placement of the building and other structures (including walls and fences) on the building site shall be such that water or mud flow will not be a hazard to the building or adjacent property. SECTION 5. Section 308(b) of said Building Code is amended by amending Subdivision 2 to read: 2. Work requiring a building or grading permit by this code is not permitted in an area determined by the County Engineer to be subject to hazard from landslide, settlement or slippage. These hazards include those from loose debris, slopewash and the potential for mud flows from natural slopes or graded slopes. For the purpose of this section, landslide, settlement or slippage does not include surface displacement due to the earthquake faults. SECTION 6. Section 308(b) of said Building Code is amended by adding Paragraph "h" to Subdivision 3 to read: (h) Notwithstanding any other provisions of this subsection, the County Engineer may, at his descretion, deny a permit for any building, structure or grading subject to a hazard of a geological nature which cannot be mitigated and may endanger the health or safety of the occupants, adjoining property or the public. SECTION 7. Section 7005(b) of said Building Code is amended by adding paragraph number 13 to read: ordinance No. 329 13. A drainage plan for that portion of a lot or parcel to be utilized as a building site (building pad) including elevations of floors with respect to finish site grade and locations of proposed stoops, slabs and fences that may affect drainage. SECTION 8. Section 7005 of said Building Code is amended by adding Subsection (g) to read: (g) Preplan Check Site Inspection. Prior to plan check of grading plans, a site inspection shall be made. The fee for such inspection shall be as set forth in Section 303(F). The Building Official may waive this inspection and fee when he determines that the nature of the work does not require preinspection of the site. SECTION 9. Section 7010(a) of said Building Code is amended by deleting Exception 1, by renumbering Exceptions 2 and 3 to be 1 and 2 respectively and by adding a paragraph to read: (a) Compaction. All fills shall be compacted throughout their full extent to a minimum of 90 percent of maximum density as determined by A.S.T.M. Soil Compaction Test D1557.70. Field density shall be determined by a method acceptable to the Building Official. 79 L Fill slopes in excess of a 2:1 steepness ratio are to be constructed by the placement of soil a sufficient distance beyond the proposed finish slope to allow compaction equipment to operate at the outer surface limits of the final slope surface. The excess fill is to be removed prior to completion of rough grading. Other construction procedures may be utilized when it is first shown to the satisfaction of the County Engineer that the angle of slope, construction method and other factors will accomplish the intent of this section. 1. Fills not intended to support structures need not be compacted to these standards if the Building official determines that such compaction is unnecessary as a safety measure. In making this determination, the Building Official may require that an investigation be made by a soils engineer to establish the characteristics of the soil, the amount of settlement to be expected and the susceptibility of the soil to erosion or slippage. 2. Slope surfaces may be prepared for planting by scarifying, by the addition of top soil, or by other methods provided such slopes when so prepared otherwise comply with the requirements of this section. SECTION 10. Section 7010(8) of said Building Code is amended to read: (g) Inspection and Testing. The soil engineer shall provide sufficient inspection during fill placement and compaction operations to determine that such work is being performed in accordance with the conditions of plan approval and requirements of this Code. Continuous inspection shall be provided by the soil engineer or his responsible representative for all fills that will exceed a vertical height or depth of 30 feet or result in a slope surface steeper than two horizontal to one vertical. Tests to determine density of the compacted fill soils shall be made on the basis of not less than one test for each 2 foot vertical lift of the fill but not less than one test for each 1,000 cubic yards of material placed. At least one-half of the required tests shall be made at the location of the final fill slope, except that not more than one such test need be made for each 50 horizontal feet of slope in each 2 -foot vertical lift. Additional tests shall be ps"formed where deemed necessary by the soils engineer or the Building Official. All such density tests shall be reasonably uniformly distributed within the fill or fill slope surface. Results of such testing and location of tests shall be presented in the soil engineer's report. M Ordinance No. 329 Sufficient tests of soil properties, including soil types and shear strength, shall be made during grading operations to verify compliance with design criteria. The results of such testing shall be furnished to the Building Official upon the completion of grading operations or when necessitated by varying field conditions upon request by the Building Official. SECTTON 11. Section 7011 of said Building Code is amended by adding the following paragraphs to read: Swimming pools shall be set back from slopes as required by Figure 70-A for buildings subject to the following provisions: 1. The minimum setback distance from the bottom of any slope shall be that applicable to slopes not steeper than 2:1. 2. At the tops of cut or fill slopes, setbacks shall be governed by dimension "e" which shall be measured from the soil side of the pool structure. That portion of the pool structure extending above the level of measurement or within seven feet of the slope face shall be capable of supporting the water in the pool. Buildings shall be set back from natural slopes which exceed 2:1 according to the cut slope setback provisions of Figure 70-A and the requirements of Figure 70-A-1. SECTION 12. Section 7012(c) of said Building Code is amended by adding the following sentence to read: The grading shall provide for drainage around proposed buildings and their appurtenances. SECTION 13. Section 7012(e) of said Building Code is amended to read: (e) Overflow Protection. Berms, swales or other devices shall be provided at the top of cut or fill slopes to prevent surface waters from overflowing onto and damaging the face of the slope. Gutters or other special drainage controls shall be provided where the proximity of runoff from buildings or other structures is such as to pose a potential hazard to slope integrity. SECTION 14. Section 7013(a) of said Building Code is amended by adding a paragraph to read: Plant material shall be selected which will produce a coverage of permanent planting effectively controlling erosion. Consider- ation shall be given to deep-rooted plant material needing limited watering; to low maintenance during the lifetime of the project; to high root to shoot ratio(weight of above ground parts versus root system), wind susceptibility and fire retardant characteristics. SECTION 15. Subsections (a) and (b) of Section 7014 of said Building Code are amended to read: (a) General. structures, or the land, or in excess where the Building hazards exist shal engineer and shall Grading Requiremen All grading involving a fill intended to support development of more than one lot or parcel of of 5,000 cubic yards of material, or grading Official determines special conditions or unusual 1 be performed under the supervision of a civil tsomply with Subsection (c) titled, "Supervised (b) Inspection of Excavation and Fills. The permittee or his agent shall notify the Building Official a minimum of 24 hours before the grading operation is ready for each of the following inspections: Ordinance No. 329 1. Initial Inspection: When the permittee is ready to begin work, but before any grading or brushing is started. 2. Toe Inspection: After the natural ground is exposed and prepared to receive fill, but before any fill is placed. 3. Excavation Inspection: After the excavation emplacement is started, but before the vertical depth of the excavation exceed ten feet. 4. Fill Inspection: After the fill emplacement is started, but before the vertical height of the lifts exceed ten feet. 5. Drainage Device Inspection: After forms and pipe are in place, but before any concrete is placed. 6. Rough Grading: When all rough grading has been completed. 7. Final: When all work, including installation of all drainage structures and other protective devices, has been completed and the as graded plan and required reports have been submitted. The permittee need not wait for the inspector to arrive before proceeding with the work. The Building Official shall approve the work inspected or shall notify the permittee or his agent wherein it fails to comply with the requirements of this Code. In addition to the called inspections specified above, the Building Official may make such other inspections as he may deem necessary to determine that the work is being performed in compliance with the requirements of this Code. Investigations and reports by an approved soil testing agency and/or geologist may be required. SECTION 16. Subsection (c) of Section 7014 of said Building Code is amended by adding the following paragraph. In addition to the above, the grading contractor shall submit a statement in writing that the work under his direction was per- formed in accordance with the approved plans and requirements of this code or wherein such work was not in accordance with such plans and code. SECTION 17. Chapter 70 of said Building Code is amended by amending Figure No. 70-A "Required Setbacks" to be as shown in this ordinance. SECTION 18. Section 7009(a) of said Building Code is amended by adding a sentence after the first sentence to read: Substantiating calculations and supporting data may be required where the Building Official determines that such informathn is necessary to verify the stability and safety of the proposed slope. SECTION 19. The City Clerk shall certify to the adoption of this Ordinance and shall cause the same to be processed in the manner prescribed by law. APPROVED and ADOPTED this 11th day of January, 1979• 41 Mayor Mayor rthur F. Tapia ATTEST: Marg et S. Barbosa, City Clerk 92 Ordinance No. 329 STATE OF CALIFORNIA COUNTY OF LOS ANGELES ss CITY OF IRWINDALE ))) I, Margaret S. Barbosa, City Clerk of the City of Irwindale, do hereby certify that the foregoing Ordinance No. 329, was approved and adopted at a regular meeting held on the 11th day of January, 1979, by the following vote: AYES: COUNCILMEN: Barbosa, Breceda, Michael Miranda, Pat Miranda and Mayor Tapia NOES: COUNCILMEN: None ABSENT: COUNCILMEN: None Af�� `� rar�eret S. Barbosa, City Clerk