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Division 18

SEC. 91.1806. PRESUMPTIVE LOAD BEARING VALUES OF SOILS.

Los Angeles Building Code — LAMC Chapter IX · 2026-08 edition · updated 2026-09-09 · Los Angeles

(Amended by Ord. No. 185,587, Eff. 7/16/18.)

Section 1806 of the CBC is adopted by reference, except Section 1806.2 of the CBC is not adopted; and, in lieu, LAMC Subsection 91.1806.2 is added.

91.1806.2. Presumptive Load-bearing Values. The load-bearing values used in design for supporting soils near the surface shall not exceed the values specified in CBC Table 1806.2 unless data to substantiate the use of higher values are submitted and approved. Where the Department has reason to doubt the classification, strength or compressibility of the soil, the requirements of CBC Section 1803.5.2 shall be satisfied.

Presumptive load-bearing values shall apply to materials with similar physical characteristics and dispositions.

Mud, organic silt, organic clays, peat or uncertified fill shall not be assumed to have a presumptive load-bearing capacity.

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▸Contents — Los Angeles Building Code — LAMC Chapter IX
Los Angeles Building Code — LAMC Chapter IX
  1. Chapter IX
  2. Chapter IX — BUILDING REGULATIONS
  3. Division 1
  4. Division 2
  5. Division 3
  6. Division 4
  7. Division 5
  8. Division 6
  9. Division 7
  10. Division 8
  11. Division 9
  12. Division 10
  13. Division 11
  14. Division 12
  15. Division 13
  16. Division 14
  17. Division 15
  18. Division 16
  19. Division 17
  20. ▸Division 18
    Overview
    1. SEC. 91.1800. BASIC PROVISIONS.
    2. SEC. 91.1801. GENERAL.
    3. SEC. 91.1802. DESIGN BASIS.
    4. SEC. 91.1803. GEOTECHNICAL INVESTIGATION.
    5. SEC. 91.1804. EXCAVATION, GRADING AND FILL.
    6. SEC. 91.1806. PRESUMPTIVE LOAD BEARING VALUES OF SOILS.
    7. SEC. 91.1807. FOUNDATION WALLS, RETAINING WALLS, AND EMBEDDED …
    8. SEC. 91.1808. FOUNDATIONS.
    9. SEC. 91.1810. DEEP FOUNDATIONS..
  21. Division 19
  22. Division 20
  23. Division 21
  24. Division 22
  25. Division 23
  26. Division 24
  27. Division 25
  28. Division 26
  29. Division 27
  30. Division 28
  31. Division 29
  32. Division 30
  33. Division 31
  34. Division 32
  35. Division 33
  36. Division 34
  37. Division 35
  38. Division 61
  39. Division 62
  40. Division 63
  41. Division 67
  42. Division 70
  43. Division 71
  44. Division 72
  45. Division 82
  46. Division 83
  47. Division 85
  48. Division 88
  49. Division 89
  50. Division 90
  51. Division 91
  52. Division 92
  53. Division 93
  54. Division 94
  55. Division 95
  56. Division 96
  57. Division 5 — REGISTRATION
  58. Division 16A
  59. Division 17
  60. Division 18
  61. Division 19
  62. Division 20
  63. Division 21
  64. Division 17
  65. Division 18
  66. Division C
  67. Division D

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