Cover [PDF]

Standards [PDF]

Foreword [PDF]

Acknowledgements [PDF]

Dedication [PDF]

Contents [PDF]

Chapter 1 General

Chapter 2 Combinations of Loads

Chapter 3 Dead Loads, Soil Loads, and Hydrostatic Pressure

Chapter 4 Live Loads

Chapter 5 Flood Loads

Chapter 6 Reserved for Future Provisions

Chapter 7 Snow Loads

Chapter 8 Rain Loads

Chapter 9 Reserved for Future Provisions

Chapter 10 Ice Loads - Atmospheric Icing

Chapter 11 Seismic Design Criteria

Chapter 12 Seismic Design Requirements for Building Structures

Chapter 13 Seismic Design Requirements for Nonstructural Components

Chapter 14 Material Specific Seismic Design and Detailing Requirements

Chapter 15 Seismic Design Requirements for Nonbuilding Structures

Chapter 16 Seismic Response History Procedures

Chapter 17 Seismic Design Requirements for Seismically Isolated Structures

Chapter 18 Seismic Design Requirements for Structures with Damping Systems

Chapter 19 Soil-Structure Interaction for Seismic Design

Chapter 20 Site Classification Procedure for Seismic Design

Chapter 21 Site-Specific Ground Motion Procedures for Seismic Design

Chapter 22 Seismic Ground Motion Long-Period Transition and Risk Coefficient Maps

Chapter 23 Seismic Design Reference Documents

Chapter 24

Chapter 25

Chapter 26 Wind Loads: General Requirements

Chapter 27 Wind Loads on Buildings‒MWFRS (Directional Procedure)

Chapter 28 Wind Loads on Buildings‒MWFRS (Envelope Procedure)

Chapter 29 Wind Loads on Other Structures and Building Appurtenances‒MWFRS

Chapter 30 Wind Loads ‒ Components and Cladding (C&C)

Chapter 31 Wind Tunnel Procedure

Appendix 11A Quality Assurance Provisions

Appendix 11B Existing Building Provisions

Appendix C Serviceability Considerations

Appendix D Buildings Exempted from Torisional Wind Load Cases

Dead loads consist of the weight of all materials of construction incorporated into the building including, but not limited to, walls, floors, roofs, ceilings, stairways, built-in partitions, finishes , cladding, and other similarly incorporated architectural and structural items and fixed service equipment including the weight of cranes.
In determining dead loads for purposes of design , the actual weights of materials and constructions shall be used provided that in the absence of definite information, values approved by the authority having jurisdiction shall be used.
In determining dead loads for purposes of design, the weight of fixed service equipment, such as plumbing stacks and risers; electrical feeders; and heating, ventilating, and air conditioning systems shall be included.
In the design of structures below grade, provision shall be made for the lateral pressure of adjacent soil. If soil loads are not given in a soil investigation report approved by the authority having jurisdiction, then the soil loads specified in Table 3.2-1 shall be used as the minimum design lateral loads. Due allowance shall be made for possible surcharge from fixed or moving loads. When a portion or the whole of the adjacent soil is below a free-water surface, computations shall be based upon the weight of the soil diminished by buoyancy, plus full hydrostatic pressure.
    The lateral pressure shall be increased if soils with expansion potential are present at the site as determined by a geotechnical investigation.

Table 3.2-1 Design Lateral Soil Load
Description of Backfill Material Unified Soil classification Design Lateral Soil Loada
psf per foot of depth (kN/m2 per meter of depth)
Well-graded , clean gravels ; gravel-sand mixes GW 35 (5.50)b
Poorly graded clean gravels, gravel-sand mixes GP 35 (5.50)b
Silty gravels , poorly graded gravel-sand mixes GM 35 (5.50)b
Clayey gravels , poorly graded gravel-and-clay mixes GC 45 (7.07)b
Well-graded, clean sands; gravelly- sand mixes SW 35 (5.50)b
Poorly graded clean sands, sand-gravel mixes SP 35 (5.50)b
Silty sands, poorly graded sand-silt mixes SM 45 (7.07)b
Sand-silt clay mix with plastic fines SM-SC 85 (13.35)c
Clayey sands , poorly graded sand-clay mixes SC 85 (13.35)c
Inorganic silts and clayey silts ML 85 (13.35)c
Mixture of inorganic silt and clay ML-CL 85 (13.35)c
Inorganic clays of low to medium plasticity CL 100 (15.71)
Organic silts and silt-clays, low plasticity OL d
Inorganic clayey silts , elastic silts MH d
Inorganic clays of high plasticity CH d
Organic clays and silty clays OH d
aDesign lateral soil loads are given for moist conditions for the specified soils at their optimum densities. Actual field conditions shall govern. Submerged or saturated soil pressures shall include the weight of the buoyant soil plus the hydrostatic loads.
bFor relatively rigid walls, as when braced by floors, the design lateral soil load shall be increased for sand and gravel type soils to 60 psf (9.43 kN/m2) per foot (meter) of depth . Basement walls extending not more than 8 ft (2.44 m) below grade and supporting light floor systems are not considered as being relatively rigid walls.
cFor relatively rigid walls, as when braced by floors, the design lateral load shall be increased for silt and clay type soils to 100 psf (15.71 kN/m2 ) per foot (meter) of depth . Basement walls extending not more than 8 ft (2.44 m) below grade and supporting light floor systems are not considered as being relatively rigid walls.
dUnsuitable as backfill material.
In the design of basement floors and similar approximately horizontal elements below grade, the upward pressure of water, where applicable, shall be taken as the full hydrostatic pressure applied over the entire area. The hydrostatic load shall be measured from the underside of the construction. Any other upward loads shall be included in the design.
    Where expansive soils are present under foundations or slabs-on- ground, the foundations, slabs, and other components shall be designed to tolerate the movement or resist the upward loads caused by the expansive soils, or the expansive soil shall be removed or stabilized around and beneath the structure.
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