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1997 UBC Structural CheckListtBased on the 1997 Uniform Building Codet(UBC)

The reproduction of this printed publication or diskette in whole or in part is not permitted. One copy of the diskette for backup is permitted. This product is owned and the copyright held by the International Conference of Building Officials.

COPYRIGHT E 1999 by

INTERNATIONAL CONFERENCE OF BUILDING OFFICIALS5360 Workman Mill Road, Whittier, California 90601-2298

PREFACEThe International Conference of Building Officials is pleased to offer the following set of checklists: 1997 UBC Accessibility CheckListt 1997 UBC Nonstructural CheckListt 1997 UBC Structural CheckListt 1997 UMC CheckListt 1997 UFC CheckListt The checklists have been developed to facilitate the architect, designer, civil engineer and plan reviewer in the plan review process. These checklists are comprehensive and, as a result, somewhat lengthy. However, they have been organized and categorized into subjects that allow the user to quickly identify which comments are applicable to the project. A code section is referenced within each comment so that the user may refer to the code provision for further clarification. The comments in the UBC Structural CheckList have been further classified with a subject title for each comment because of the technical nature of the list.

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TABLE OF CONTENTS

I. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. B. C. Required Plans, Reports and Structural Calculations . . . . . . . . . . . . . 1 Explanations for Computer Programs, Input and Output . . . . . . . . . . 1 Special Inspection and Structural Observation Requirements . . . . . 2

II. DESIGN LOADS OTHER THAN EARTHQUAKE AND WIND . . . . . . . . . . . 5 A. B. C. D. E. F. G. Load Combinations Strength Design and Working Stress Design. Reduction of Live Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Floor Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Roof Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Special Loads and Other Minimum Loads . . . . . . . . . . . . . . . . . . . . . . Soil Design Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deflection Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 5 6 7 7 8

III. WIND DESIGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 A. B. C. D. Design Formula (201) Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Primary Frames and Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Overturning Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Elements and Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

IV. EARTHQUAKE DESIGN LOADS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. B. C. D. E. F. G. H. I. J. K. Terms used to Calculate Earthquake Load E and Resulting Earthquake Design Forces . . . . . . . . . . . . . . . . . . . . . . . . . Minimum Design Lateral Forces and Related Effects . . . . . . . . . . . . Static Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dynamic Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Horizontal Distribution of Shear and Torsional Moments . . . . . . . . . Overturning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PD Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vertical Component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Floor and Roof Diaphragms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Elements of Structures and Nonstructural Components Supported by Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonbuilding Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 12 12 14 15 15 15 16 16 16 16

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V.

EARTHQUAKE DESIGN SYSTEM DESIGN REQUIREMENTS . . . . 19 A. B. C. D. E. F. G. H. I. J. K. Special Requirements for Irregular Structures . . . . . . . . . . . . . . . . . . Story Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Orthogonal Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connection Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deformation Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ties and Continuity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Collector Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diaphragms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Framing Below the Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Building Separations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anchorage of Concrete or Masonry Walls . . . . . . . . . . . . . . . . . . . . . 19 19 19 20 20 21 21 21 22 22 22

VI. FOUNDATION DESIGN REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 23 A. B. C. Foundation Investigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Footing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Pile Foundations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

VII. CONCRETE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 A. B. C. D. Material Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reinforcement Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Design Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Seismic Design Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 28 37 47

VIII. MASONRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 A. B. C. D. E. F. G. H. I. J. K. Material Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Working Stress Design and Strength Design Requirements for Unreinforced and Reinforced Masonry . . . . . . . . . . . . . . . . . . . . . Reinforcement Requirements for Working Stress Design and Strength Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Requirements for Working Stress Design . . . . . . . . . . . . . . Requirements for Working Stress Design Reinforced Masonry . Allowable Stresses for Working Stress Design Reinforced Masonry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Allowable Stresses for Working Stress Design Unreinforced Masonry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Requirements for Strength Design . . . . . . . . . . . . . . . . . . . . Requirements for Strength Design Reinforced Masonry . . . . . . . Empirical Design of Masonry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glass Masonry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 66 67 69 70 70 72 74 74 78 78

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L.

Seismic Design Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

IX. STEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 A. B. C. D. E. F. G. H. I. Cold-formed Steel Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cold-formed Stainless Steel Construction . . . . . . . . . . . . . . . . . . . . . Open-web Steel Joists and Joist Girders . . . . . . . . . . . . . . . . . . . . . . Steel Storage Racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steel Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Allowable Stress Design Requirements . . . . . . . . . . . . . . . . . . . . . . . Seismic Design Requirements (Seismic Zones 3 and 4) . . . . . . . . . 81 81 81 81 81 81 81 81 86

X. WOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 A. B. C. D. E. F. G. H. I. J. Material Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Adjustment Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Beam Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 Column Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Bearing at Angle to Grain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Timber Connectors and Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Glulam Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 Truss Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . .