ASCE 7 1993 : 1993

1 General
1.1 Scope
1.2 Basic requirements
1.3 General structural integrity
1.4 Classification of buildings and other structures
1.5 Additions to existing structures
1.6 Load tests
2 Combination of loads
2.1 Definitions and limitations
2.2 Symbols and notation
2.3 Combining loads using allowable stress design
2.4 Combining loads using strength design
2.5 Counteracting loads
3 Dead loads
3.1 Definition
3.2 Weights of materials and constructions
3.3 Weight of fixed service equipment
3.4 Special considerations
4 Live loads
4.1 Definition
4.2 Uniformly distributed loads
4.3 Concentrated loads
4.4 Loads on handrails and guardrail systems
4.5 Loads not specified
4.6 Partial loading
4.7 Impact loads
4.8 Reduction in live loads
4.9 Posting of live loads
4.10 Restrictions on loading
4.11 Minimum roof live loads
4.12 References
5 Soil and hydrostatic pressure
5.1 Pressure on basement walls
5.2 Uplift on floors
6 Wind loads
6.1 General
6.2 Definitions
6.3 Symbols and notation
6.4 Calculation of wind loads
6.5 Velocity pressure
6.6 Gust response factors
6.7 Pressure and force coefficients
7 Snow loads
7.1 Symbols and notation
7.2 Ground snow loads, pg
7.3 Flat-roof snow loads, pf
7.4 Sloped-roof snow loads, ps
7.5 Unloaded portions
7.6 Unbalanced roof snow loads
7.7 Drifts on lower roofs (aerodynamic shade)
7.8 Roof projections
7.9 Sliding snow
7.10 Extra loads from rain-on-snow
7.11 Ponding loads
8 Rain loads
8.1 Roof drainage
8.2 Ponding loads
8.3 Blocked drains
8.4 Controlled drainage
9 Earthquake loads
9.1 General provisions
9.2 Definitions and symbols
9.3 Structural design requirements
9.4 Equivalent lateral force procedure
9.5 Model analysis procedure
9.6 Soil structure interaction
9.7 Foundation design requirements
9.8 Architectural, mechanical, and electrical
      components and systems
9.9 Wood
9.10 Steel
9.11 Reinforced concrete
9.12 Masonry
Appendix A.9 - Supplemental provisions
A.9.1 Purpose
A.9.7 Supplementary foundation requirements
A.9.9 Supplementary provisions for wood
A.9.10 Supplementary provisions for steel
A.9.11 Supplementary provisions for reinforced concrete
A.9.12 Supplementary provisions for masonry
Commentary to American Society of Civil Engineers
Standard ASCE 7-93
1 General
2 Combination of loads
3 Dead loads
4 Live loads
5 Soil and hydrostatic pressure
6 Wind loads
7 Snow loads
8 Rain loads
9 Earthquake loads
Index
List of tables
1 Classification of buildings and other
         structures for wind, snow and earthquake loads
2 Minimum uniformly distributed live loads, Lo
3 Minimum concentrated loads
4 Design wind pressures, p, and forces, F
5 Importance factor, I (wind loads)
6 Velocity pressure exposure coefficient, Kz
7 Basic wind speed, V
8 Gust response factors, Gh and Gz
9 Internal pressure coefficients of buildings,
         GCpi
10 External pressure coefficients for arched
         roofs, Cp
11 Force coefficients for monoslope roof over
         unenclosed buildings and other structures, Cf
12 Force coefficients for chimneys, tanks, and
         similar structures, Cf
13 Force coefficients for solid signs, Cf
14 Force coefficients for open signs and lattice
         frameworks, Cf
15 Force coefficients for trussed towers, Cf
16 Force coefficients for tower guys, CD and CL
17 Ground snow loads, pg, for Alaskan locations
18 Exposure factor, Ce
19 Thermal factor, Ct
20 Importance factor, I (snow loads)
9.1-1 Seismic performance category
9.3-1 Site coefficient
9.3-2 Structural systems
9.3-3 Plan structural irregularities
9.3-4 Vertical structural irregularities
9.3-5 Analysis procedures for seismic performance
         categories D and E
9.3-6 Allowable story drift, Delta a
9.4-1 Coefficient for upper limit on calculated
         period
9.8-1 Architectural component seismic coefficient
         (Cc) and performance criteria factor (P)
9.8-2 Mechanical and electrical component and system
         seismic coefficient (Cc) and performance
         criteria factor (P)
A.9.9-1 Capacity reduction factors
A.9.9-3 Allowable shear in pounds per foot (at working
         stress) for horizontal structural use panel
         diaphragms with framing members of Douglas Fir-
         larch or southern pine for seismic loadings
A.9.9-4 Allowable shear for wind or seismic forces in
         pounds per foot for structural use shear walls
         with framing of Douglas fir larch or southern
         pine
A.9.9-5 Allowable working stress shears for wind or
         seismic loading on vertical shear panels of
         fiberboard sheathing board
A.9.9-6 Allowable working stress shears for shear walls
         of lath and plaster, gypsum sheathing board,
         and gypsum wallboard wood-framed assemblies
A.9.12-1 Seismic zones used in ref 12.1 Appendix A and
         replacement seismic performance categories
C1 Minimum design dead loads
C2 Minimum densities for design loads from
         materials
C3 Minimum uniformly distributed live loads
C4 Typical live load statistics
C5 Ambient air density values for various
         altitudes
C6 Exposure category constants
C7 Wind-speed data for locations in the United
         States
C8 Probability of exceeding design wind speed
         during reference period
C9 Parameters s and gamma
C10 Ground snow loads at 184 national weather
         service locations at which load measurements
         are made
C11 Comparison of some site-specific values and
         zoned values in shaded areas of Figs. 5, 6 and
         7
C12 Factors for converting from other annual
         probabilities of being exceeded, and other mean
         recurrence intervals, to that used in this
         Standard
List of figures
1 Basic wind speed
2 External pressure coefficients, Cp, for average
     loads on main wind-force resisting systems
3 External pressure coefficients, GCp, for loads on
     building components and cladding for building with
     mean roof height h less than or equal to 60 feet
4 External pressure coefficients, GCp, for loads on
     building components and cladding for building with
     mean roof height h greater than 60 feet
5 Ground snow loads, pg, for the Western US
6 Ground snow loads, pg, for the Central US
7 Ground snow loads, pg, for the Eastern US
8 Graphs for determining roof slope factor, Cs, for
     warm and cold roofs
9 Balanced and unbalanced snow loads for hip and
     gable roofs
10 Unbalanced loading conditions for curved roofs
11 Balanced and unbalanced loads for a sawtooth roof
12 Configuration of drift on lower roofs
13 Graphs and equation for determining drift height,
     hd
9-1 Contour map for coefficient Aa
9-2 Contour map for coefficient Av

Provides revised earthquake load criteria and associated load combinations for the design and construction of buildings and other structures subject to earthquake ground motions. The proposed revisions are based on the 1991 edition of NEHRP Recommended Provisions for the Development of Seismic Regulations for New Buildings, and the have been approved by the ASCE 7 standards committee with certain changes.