ICC IBC SEAOC WDM 2018
$51.46
Wind Design Manual Based on the 2018 IBC and ASCE/SEI 7-16 Examples for Wind Forces on Buildings and Solar Photovoltaic Systems
Published By | Publication Date | Number of Pages |
ICC | 2018 | 355 |
The Wind Design Manual provides examples on wind force design that illustrate the practical requirements of provisions in ASCE/SEI 7-16: Minimum Design Loads and Associated Criteria for Buildings and Other Structures. Practicing structural engineers, trained designers, building department engineers, other plan review agencies, professors and students, can all learn from these examples of code-compliant designs engineered to achieve good performance under wind loading. Developed by the Wind Design Manual Task Group of the Structural Engineers Association of California (SEAOC), the publication draws on the expertise of invited authors from various parts of the United States. The Wind Design Manual is intended for nationwide use, with example problems that apply to a variety of geographic areas. All are presented in a format similar to the SEAOC Structural/Seismic Design Manuals. A wide range of topics is covered General topics (4 examples) Specific topics (2 examples) Buildings (3 examples) Solar Photovoltaic systems (7 examples)
PDF Catalog
PDF Pages | PDF Title |
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1 | WIND DESIGN MANUAL BASED ON THE 2018 IBC® AND ASCE/SEI 7-16 |
2 | WIND DESIGN MANUAL BASED ON THE 2018 IBC® AND ASCE/SEI 7-16 EXAMPLES FOR WIND FORCES ON BUILDINGS AND SOLAR PHOTOVOLTAIC SYSTEMS TITLE PAGE |
3 | COPYRIGHT |
6 | TABLE OF CONTENTS |
8 | PREFACE TO THE WIND DESIGN MANUAL |
10 | ACKNOWLEDGEMENTS |
14 | HOW TO USE THIS DOCUMENT |
16 | REFERENCES |
18 | DESIGN EXAMPLE 1 ENCLOSURE CLASSIFICATION OVERVIEW IMAGE: AIR MATTRESS |
19 | OUTLINE DEFINITIONS TABLE 26.13-1 |
20 | 1. ENCLOSURE CLASSIFICATIONS ASCE TABLE 26.13-1 MAIN WIND FORCE RESISTING SYSTEM AND COMPONENTS AND CLADDING (ALL HEIGHTS): INTERNAL PRESSURE COEFFICIENT, (GCpi), FOR ENCLOSED, PARTIALLY ENCLOSED, PARTIALLY OPEN, AND OPEN BUILDINGS (WALLS AND ROOF) |
21 | 1.1 DEFINITIONS OF OPENINGS 1.2 PROBLEM STATEMENT 2. DESIGN EXAMPLE PROBLEM 1A IMAGE: AGRICULTURAL BUILDING |
22 | 2.1 DETERMINATION STEP 1 IDENTIFY THE OPENINGS STEP 2 CHECK OPEN BUILDING REQUIREMENTS STEP 3 CHECK PARTIALLY ENCLOSED BUILDING REQUIREMENTS |
23 | STEP 4 CHECK ENCLOSED BUILDING REQUIREMENTS STEP 5 CHECK PARTIALLY OPEN BUILDING REQUIREMENTS 2.2 SUMMARY |
24 | 3. DESIGN EXAMPLE PROBLEM 1B IMAGE: AGRICULTURAL BUILDING 3.1 DETERMINATION OF ENCLOSURE STEP 1 IDENTIFY THE OPENINGS STEP 2 CHECK OPEN BUILDING REQUIREMENTS |
25 | STEP 3 CHECK PARTIALLY ENCLOSED BUILDING REQUIREMENTS 3.2 SUMMARY 4. ADDITIONAL INFORMATION |
28 | DESIGN EXAMPLE 2 TOPOGRAPHIC EFFECTS OVERVIEW OUTLINE PROBLEM 2A-ESCARPMENT-SAN FRANCISCO HELMET ROCK |
29 | FIGURE 2-1 EXAMPLE SITE NEAR HELMENT ROCK, SAN FRANCISCO FIGURE 2-2 GOOGLE EARTH TOPOGRAPHIC SECTION WITH NOTATIONS ADDED |
30 | FIGURE 2-3 IDEALIZATION OF 2D ESCARPMENT ACCORDING TO FIGURE 26.8-1 DETERMINATION OF TOPOGRAPHIC EFFECT BY SECTION 26.8 |
31 | FIGURE 2-4 PROVIDES Kzt FOR z BETWEEN 0 AND 200 FEET ELEVATION AT THIS SITE PROBLEM 2B-EFFECT OF STRUCTURE LOCATION RELATIVE TO HILL FEATURE FOR Kzt |
32 | FIGURE 2-5 VARIATION OF Kzt WITH STRUCTURE LOCATION PROBLEM 2C- 3D AXISYMMETRIC HILL-AMITY, OREGON |
33 | FIGURE 2-6 EXAMPLE SITE NEAR AMITY, OREGON FIGURE 2-7 TOPOGRAPHIC SECTION PROVIDED BY GOOGLE EARTH WITH NOTATIONS ADDED |
34 | FIGURE 2-8 IDEALIZATION OF 2D AXISYMMETRIC HILL ACCORDING TO FIGURE 26.8-1 DETERMINATION OF TOPOGRAPHIC EFFECT BY SECTION 26.8 |
35 | FIGURE 2-9 EXAMPLE 2B Kzt FOR SITE LOCATED AT PEAK OF 3D AXISYSMMETRIC HILL |
36 | PROBLEM 2D-DIRECTION-SPECIFIC TOPOGRAPHIC SPEED UP FIGURE 2-10 DIRECTION-SPECIFIC EXPOSURE AND TOPOGRAPHIC EFFECTS |
37 | FIGURE 2-11 HILL GEOMETRY AT 45-DEGREE AZIMUTH SECTIONS |
38 | TABLE 2-1 HILL GEOMETRY PARAMETERS TABLE 2-2 SUMMARY OF THE CRITICAL WIND EFFECT DIRECTIONS BY DESIGN PROCEDURE |
39 | FIGURE 2-12 PROBLEM 2D AZIMUTH PLOT OF Kzt, Kz, and Kzt, Kz AT ELEVATION 33 FEET SUMMARY ADDITIONAL INFORMATION |
40 | DESIGN EXAMPLE 3A EXPOSURE CATEGORY/SURGACE ROUGHNESS CATEGORY OVERVIEW FIGURE 3A-1, ASCE 7 FIGURE C26.7-8 DETERMINATION OF WIND LOADS FROM DIFFERENT DIRECTIONS OUTLINE |
41 | 1. EXPOSURE AND SURFACE ROUGHNESS CATEGORIES 1.1 WIND DIRECTION AND SECTORS FIGURE 3A-2 SITE IN TRACY, CA |
42 | 1.2 SURFACE ROUGHNESS CATEGORY FIGURE 3A-3 ASCE 7 TABLE C26.7-1 |
43 | FIGURE 3A-4 ASCE 7 FIGURE C26.7-2 |
44 | FIGURE C26.7-3 EXPOSURE B WITH UPWIND OPEN PATCHES SECTOR ANALYSIS |
45 | FIGURE C26.7-4 MINIMUM AREA OF INDIVIDUAL OPEN PATCHES AFFECTING QUALIFICATION OF EXPOSURE B |
46 | 2. DESIGN EXAMPLE 3A-EXPOSURE CATEGORY/SURFACE ROUGHNESS CATEGORY SECTOR 1 CATEGORY C CATEGORY B SECTOR 2 CATEGORY C |
47 | FIGURE 3A-7 SECTOR 1 AND 2 |
48 | SECTOR 3 CATEGORY C SECTOR 4 CATEORY B |
49 | FIGURE 3A-8 SECTORS 3 AND 4 SECTOR 5 CATEORY B |
50 | SECTOR 6 CATEGORY B |
51 | FIGURE 3A-9 SECTORS 5 AND 6 |
52 | FIGURE 3A-10 OPEN PATCH DISTANCE |
53 | FIGURE 3A-11 OPEN PATCH DISTANCE |
54 | SECTOR 7 CATEGORY B SECTOR 8 CATEGORY B |
55 | FIGURE 3A-12 SECTORS 7 AND 8 |
56 | 3. EXPOSURE REQUIREMENTS TABLE 3A-1 EXPOSURE REQUIREMENTS |
58 | DESIGN EXAMPLE 3B DETERMINATION OF AN INTERMEDIATE EXPOSURE AT A TRANSITION ZONE OVERVIEW OUTLINE PROBLEM STATEMENT DETERMINE THE FOLLOWING |
59 | 1. SITE TOPOGRAPHIC INFORMATION FIGURE 3B-1 SECTOR 8 AERIAL IMAGERY 2. CALCULATION OF INTERMEDIATE VELOCITY PRESSURE COEFFICIENT 2.1 DETERMINE ROUGHNESS LENGTHS AND HEIGHTS |
60 | FIGURE 3B-2 SECTOR 8 ROUGHNESS CHANGES 2.2 CALCULATE (α) AND zg AT STATION 1 EQUATION C26.10-3 EQUATION C26.10-4 2.3 CALCULATE THE VELOCITY PRESSURE COEFFICIENTS AT STATION 1 EQUATION C26.10-1 |
61 | 2.4 CALCULATE THE DISTANCE x0 EQUATION C26.10-8 2.5 CALCULATE THE FUNCTION FΔK(x) EQUATION C26.10-7 2.6 CALCULATE THE CELOCITY PRESSURE COEFFICIENT INCREMENT ΔK EQUATION C26.10-6 2.7 CALCULATE THE ADJUSTED Kz VALUE AT STATION 2 EQUATION C26.10-5 2.8 CALCULATE (α) AND zg AT STATION 2 |
62 | 2.9 CALCULATE THE VELOCITY PRESSURE COEFFICIENTS AT STATION 2 2.10 CALCULATE THE DISTANCE x0 EQUATION C26.10-8 2.11 CALCULATE THE FUNCTION FΔK(x) EQUATION C26.10-7 |
63 | 2.12 CALCULATE THE VELOCITY PRESSURE COEFFICIENT INCREMENT ΔK 12.13 CALCULATE THE ADJUSTED Kz VALUE AT STATION 3 3. SUMMARY 4. ADDITIONAL INFORMATION AND COMMENTARY 5. ITEM NOT ADDRESSED IN THIS EXAMPLE |
64 | DESIGN EXAMPLE 4 GUST FACTOR OVERVIEW OUTLINE 1. GUST EFFECT VARIABLES |
65 | 2. APPROXIMATE NATURAL FREQUENCY FIGURE 4-1 BUILDING PROPERTIES EQUATION 26.11-1 |
66 | EQUATION 26.11-2 EQUATION 26.11-3 EQUATION 26.11-4 FIGURE 4-2 ASCE 7 FIGURE C26.11-1 APPROXIMATE NATURAL FREQUENCY |
67 | EQUATION C26-11.9 EQUATION C26-11.10 FIGURE 4-3 COMPARISON OF SEISMIC VERSUS WIND |
68 | 3. FLEXIBLE BUILDING GUST FACTOR Gf FIGURE 4-4 PLAN OF EXAMPLE BUILDING |
69 | STEP 1 AERODYNAMIC HEIGHT, z TABLE 26.11-1 STEP 2 TURBULENCE INTENSITY, Iz EQUATION 26.11-7 STEP 3 INTEGRAL LENGTH SCALE OF TURBULENCE, Lz EQUATION 26.11-9 |
70 | STEP 4 MEAN HOURLY WIND SPEED, V z EQUATION 26.11-16 STEP 5 GUST RESPONSE PEAK FACTOR, gR |
71 | STEP 6 BACKGROUND RESPONSE, Q EQUATION 26.11-8 STEP 7 REDUCED FREQUENCY, N1 EQUATION 26.11-14 STEP 8 SIZE EFFECT FACTORS, R h , RB, AND RL |
72 | TABLE 4-1 TURBULENCE COHERENCE FACTORS AND SIZE EFFECT FACTORS STEP 9 RESONANT RESPONSE FACTOR, R EQUATION 26.11-13 EQUATION 26.11-12 |
73 | STEP 10 FLEXIBLE STRUCTURE GUST FACTOR, G EQUATION 26.11-10 4. RIGID BUILDING GUST FACTOR STEP 1 AERODYNAMIC HEIGHT, z |
74 | STEP 2 TURBULENCE INTENSITY, Iz EQUATION 26.11-7 STEP 3 INTEGRAL LENGTH SCALE OF TURBULENCE, Lz EQUATION 26.11-9 STEP 4 BACKGROUND RESPONSE, Q EQUATION 26.11-8 |
75 | STEP 5 RIGID RESPONSE GUST EFFECT FACTOR, G EQUATION 26.11-6 5. CONCLUDING THOUGHTS |
76 | 6. ITEMS NOT ADDRESSED IN THIS EXAMPLE REFERENCES |
78 | DESIGN EXAMPLE 5 TORNADO STORM SHELTER OVERVIEW |
79 | OUTLINE 1. SHELTER GEOMETRY AND IBC LOAD CRITERIA 1.1 SHELTER GEOMETRY |
80 | FIGURE 5-1 STORM SHELTER ROOF PLAN |
81 | FIGURE 5-2 HOST BUILDING ROOF PLAN ABOVE STORM SHELTER 1.2 IBC LOAD CRITERIA 1.2.1 ROOF DEAD LOAD |
82 | TABLE 5-1 ROOF DEAD LOADS 1.2.2 ROOF LIVE LOAD 2. ICC 500 STORM SHELTER LOAD CRITERIA 2.1 RAIN LOADS 2.2 SHELTER ROOF LIVE LOADS |
83 | 2.3 WIND LOADS TABLE 5-2 DESIGN VALUES |
84 | TABLE 5-3 MWFRS WIND LOADS |
85 | TABLE 5-4A C&C WALL WIND LOADS |
86 | TABLE 5-4B C&C ROOF WIND LOADS |
87 | 2.4 CONNECTIONS TO THE HOST BUILDING 2.5 DEBRIS HAZARDS 2.5.1 WIND-BORNE DEBRIS MISSILE IMPACT TABLE 5-5 WIND-BORNE MISSILE SPEED |
88 | 2.5.2 FALLING DEBRIS/COLLAPSE LIVE LOAD TABLE 5-6 COLLAPSE LOAD |
89 | 3. ROOF DESIGN 3.1 COMPOSITE DECK DESIGN TABLE 5-7 DESIGN LOADS FOR COMPOSITE DECK DESIGN EQUATION 16-8 EQUATION 16-10 EQUATION 16-12 EQUATION 16-13 EQUATION 16-15 EQUATION 16-1 EQUATION 16-3 EQUATION 16-14 EQUATION 16-16 |
90 | 3.2 CONNECTION BETWEEN SLAB AND JOISTS |
91 | ACI 318 EQUATION 17.4.2.1A FIGURE 5-3 BREAKOUT CONE FOR HEADED STUD CONNECTION TO STEEL JOIST |
92 | 3.3 JOIST DESIGN TABLE 5-8 JOIST LOADS EQUATION 16-8 EQUATION 16-10 EQUATION 16-12 EQUATION 16-13 EQUATION 16-15 |
93 | 4. WALL DESIGN 4.1 EXTERIOR WALL DESIGN FIGURE 5-4 EXTERIOR WALL DESIGN CASES |
94 | 4.1.1 BEARING WALL CASE TABLE 5-9 DOWNWARD DESIGN LOADS |
95 | FIGURE 5-5 BEARING WALL CASE (A) LOADING (NORTH-SOUTH WALLS) |
96 | 4.1.2 SHEAR WALL CASE FIGURE 5-6 WIND PRESSURES FOR WIND IN TWO ORTHOGONAL DIRECTIONS FIGURE 5-7 WIND PRESSURES FOR WIND 45 DEGREES TO TWO ORTHOGONAL DIRECTIONS |
97 | TABLE 5-10 MWFRS LOADS FIGURE 5-8 WIND PRESSURES FOR WIND IN EAST-WEST DIRECTION |
99 | FIGURE 5-9 SHEAR WALL CASE LOADING (NORTH-SOUTH WALLS) 4.1.3 EXTERIOR WALL DESIGN |
100 | 4.2 INTERIOR WALL DESIGN 5. FOUNDATION DESIGN 5.1 UPLIFT CHECK |
101 | 5.2 CONTINUOUS FOOTING DESIGN 6. CONNECTION DESIGN |
102 | FIGURE 5-10 TOP OF WALL CONNECTION DETAILS |
103 | FIGURE 5-11 BOTTOM OF WALL CONNECTION DETAILS |
104 | 7. ITEMS NOT ADDRESSED IN THIS EXAMPLE |
106 | DESIGN EXAMPLE 6 HIGH WINDS EXAMPLE OVERVIEW FIGURE 6-1 BUILDING PLAN AND ELEVATION OUTLINE |
107 | 1. DETERMINE WIND LOAD DESIGN PROCEDURE 2. CHAPTER 27-PART 1: ENCLOSED, PARTIALLY ENCLOSED, AND OPEN BUILDINGS OF ALL HEIGHTS |
108 | FIGURE 6-2 ASCE 7 TABLE 27.2-1 STEP 1 DETERMINE RISK CATEGORY OF BUILDING |
109 | STEP 2 DETERMINE THE BASIC WIND SPEED, V, FOR THE APPLICABLE RISK CATEGORY FIGURE 6-3 ASCE/SEI HAZARD TOOL RESULTS |
110 | STEP 3 DETERMINE WIND LOAD PARAMETERS |
111 | STEP 4 DETERMINE VELOCITY PRESSURE EXPOSURE COEFFICIENT |
112 | FIGURE 6-4 ASCE 7 TABLE 26.10-1 |
113 | STEP 5 DETEMINE VELOCITY PRESSURE qz EQUATION 26.10-1 |
114 | STEP 6 DETERMINE EXTERNAL PRESSURE COEFFICIENT FIGURE 6-5 ASCE 7 FIGURE 27.3-1 |
115 | FIGURE 6-5 (CONTINUED) ASCE 7 FIGURE 27.3-1 |
116 | STEP 7 CALCULATE WIND PRESSURE, p, ON EACH BUILDING SURFACE EQUATION 27.3-1 |
118 | FIGURE 6-6 EAST – WEST DIRECTION MWFRS BUILDING PRESSURES |
120 | FIGURE 6-7 NORTH-SOUTH DIRECTION MWFRS BUILDING PRESSURES 3. DETERMINE WIND LOAD DESIGN PROCEDURE-COMPONENTS AND CLADDING (C&C) |
121 | 4. CHAPTER 30- PART 1 LOW-RISE BUILDINGS FIGURE 6-8 ASCE 7 TABLE 30.3-1 |
122 | STEP 6 DETERMINE EXTERNAL PRESSURE COEFFICIENT |
123 | FIGURE 6-9 ASCE 7 FIGURE 30.3-1 |
124 | FIGURE 6-10 ASCE 7 FIGURE 30.3-2A |
125 | EQUATION 30.3-1 |
126 | FIGURE 6-11 ASCE 7 FIGURE C30-1 FIGURE 6-12 BUILDING CONFIGURATION |
128 | DESIGN EXAMPLE 7A WIND FORCES ON A SIMPLE DIAPHRAGM BUILDING-PART 2 METHOD OVERVIEW |
129 | OUTLINE 1. BUILDING AND SITE INFORMATION 1.1 BUILDING INFORMATION |
130 | FIGURE 7A-1 TYPICAL FLOOR PLAN |
131 | FIGURE 7A-2A BUILDING ELEVATION (HIP ROOF BUILDING) FIGURE 7A-2B BUILDING ELEVATION (FLAT ROOF BUILDING) 1.2 SITE INFORMATION 2. DETERMINE APPLICABILITY OF SIMPLIFIED METHOD |
133 | 3. WIND LOAD PARAMETERS SPECIFIED IN CHAPTER 26 |
134 | 4. DETERMINE SIMPLIFIED DESIGN WIND PRESSURES TABLE 7A-1 HIP ROOF ps30 PRESSURES |
135 | TABLE 7A-2 FLAT ROOF ps30 PRESSURES |
136 | 5. DETERMINE ADJUSTMENT FACTOR FOR BUILDING HEIGHT AND EXPOSURE TABLE 7A-3 HIP ROOF ADJUSTMENT FACTORS 6. DETERMINE ADJUSTED SIMPLIFIED DESIGN WIND PRESSURES EQUATION 28.5-1 TABLE 7A-4 ADJUSTED HIP ROOF DESIGN PRESSURES, CASE A |
137 | FIGURE 7A-6A WIND PRESSURE DISTRIBUTION (HIP ROOF BUILDING), CASE A |
138 | TABLE 7A-5 HIP ROOF WIND BASE SHEAR, CASE A TABLE 7A-6 ADJUSTED HIP ROOF DESIGN PRESSURES, CASE B |
139 | FIGURE 7A-6B WIND PRESSURE DISTRIBUTION (HIP ROOF BUILDING) CASE B TABLE 7A-7 HIP ROOF WIND BASE SHEAR, CASE B |
140 | TABLE 7A-8 HIP ROOF MINIMUM WIND BASE SHEAR, CASE A TABLE 7A-9 HIP ROOF MINIMUM WIND BASE SHEAR CASE B |
141 | TABLE 7A-10 ADJUSTED FLAT ROOF DESIGN PRESSURES FIGURE 7A-6C WIND PRESSURE DISTRIBUTION (FLAT ROOF BUILDING) CASE A |
142 | TABLE 7A-11 FLAT ROOF WIND BASE SHEAR CASE A FIGURE 7A-6D WIND PRESSURE DISTRIBUTION (FLAT-ROOF BUILDING) CASE B |
143 | TABLE 7A-12 FLAT ROOF WIND BASE SHEAR CASE B 7. DISTRIBUTION OF HORIZONTAL WIND LOADS ALONG HEIGHT |
144 | TABLE 7A-13 HIP ROOF DIAPHRAGM REACTIONS, CASE A TABLE 7A-14 HIP ROOF DIAPHRAGM REACTIONS CASE B |
145 | TABLE 7A-15 FLAT ROOF DIAPHRAGM REACTIONS CASE A TABLE 7A-16 FLAT ROOF DIAPHRAGM REACTIONS CASE B |
146 | 8. VERTICAL DISTRIBUTION OF WIND UPLIFT FORCES TABLE 7A-17 HIP ROOF GROSS UPLIFT FORCES CASE A TABLE 7A-18 HIP ROOF GROSS UPLIFT FORCES CASE B |
147 | TABLE 7A-19 FLAT ROOF GROSS UPLIFT FORCES CASE A TABLE 7A-20 FLAT ROOF GROSS UPLIFT FORCES CASE B 9. ITEMS NOT ADDRESSED IN THIS EXAMPLE |
148 | DESIGN EXAMPLE 7B WIND FORCES ON A SIMPLE DIAPHRAGM BUILDING-PART 1 METHOD OVERVIEW OUTLINE |
149 | 1. BUILDING AND SITE INFORMATION 1.1 BUILDING INFORMATION FIGURE 7B-1 TYPICAL FLOOR PLAN |
150 | FIGURE 7B-2 BUILDING ELEVATION (HIP-ROOF BUILDING) 1.2 SITE INFORMATION 2. WIND LOAD PARAMETERS SPECIFIED IN CHAPTER 26 |
151 | 3. DETERMINE VELOCITY PRESSURE EXPOSURE COEFFICIENT 4. DETERMINE VELOCITY PRESSURE |
152 | EQUATION 26.10-1 TABLE 7B-1 VELOCITY PRESSURE 5. DETERMINE EXTERNAL PRESSURE COEFFICIENT |
153 | TABLE 7B-2 HIP ROOF PRESSURE COEFFICIENTS, CASE A FIGURE 7B-3A WIND PRESSURE DISTRIBUTION (HIP ROOF BUILDING) CASE A |
154 | TABLE 7B-3 HIP ROOF PRESSURE COEFFICIENTS CASE B FIGURE 7B-3B WIND PRESSURE DISTRIBUTION (HIP ROOF BUILDING) CASE B |
155 | FIGURE 7B-3C WIND PRESSURE DISTRIBUTION (HIP ROOF BUILDING) CASE B |
156 | 6. CALCULATE WIND PRESSURE EQUATION 28.3-1 TABLE 7B-4 HIP ROOF DESIGN WIND PRESSURES, p |
157 | TABLE 7B-5 HIP ROOF WIND BASE SHEAR CASE A |
158 | TABLE 7B-6 HIP ROOF BASE WIND SHEAR, CASE B TABLE 7B-7 HIP ROOF MINIMUM WIND BASE SHEAR CASE A |
159 | TABLE 7B-8 HIP ROOF MINIMUM WIND BASE SHEAR CASE B 7. DISTRIBUTION OF HORIZONTAL WIND LOADS ALONG HEIGHT |
160 | TABLE 7B-9 HIP ROOF DIAPHRAGM REACTIONS CASE A |
161 | TABLE 7B-10 HIP ROOF DIAPHRAGM REACTIONS CASE B 8. VERTICAL DISTRIBUTION OF WIND UPLIFT FORCES |
162 | TABLE 7B-11 HIP ROOF GROSS UPLIFT FORCES, CASE A TABLE 7B-12 HIP ROOF GROSS UPLIFT FORCES, CASE B |
163 | 9. DISCUSSION ON COMPARISON OF PART 1 AND PART 2 METHODS TABLE 7B-13 HIP ROOF WIND LOAD COMPARISON 10. ITEMS NOT ADDRESSED IN THIS EXAMPLE |
164 | DESIGN EXAMPLE 8A WIND FORCES ON A THREE STORY L-SHAPED BUILDING OVERVIEW |
165 | OUTLINE 1. BUILDING LOCATION, USE, AND GEOMETRY 1.1 GIVEN INFORMATION |
166 | FIGURE 8A-1 TYPICAL FLOOR FRAMING PLAN |
167 | FIGURE 8A-2 ROOF FRAMING PLAN |
168 | FIGURE 8A-3 TYPICAL BUILDING SECTION AT EXTERIOR WALL |
169 | 2. CALCULATION OF VELOCITY PRESSURES 2.1 DETERMINATION OF RISK CATEGORY 2.2 DETERMINATION OF BASIC WIND SPEED 2.3 DETERMINATION OF WIND DIRECTIONALITY FACTOR |
170 | 2.4 DETERMINATION OF EXPOSURE CATEGORY 2.5 DETERMINATION OF GROUND ELEVATION FACTOR 2.6 DETERMINATION OF GROUND ELEVATION FACTOR |
171 | 2.7 DETERMINATION OF GUST EFFECT FACTOR 2.8 DETERMINATION OF ENCLOSURE CLASSIFICATION AND INTERNAL PRESSURE COEFFICIENT |
172 | 2.9 DETERMINATION OF MEAN ROOF HEIGHT AND VELOCITY PRESSURE EXPOSURE COEFFICIENT 2.10 DETERMINATION OF VELOCITY PRESSURE |
173 | 3. DETERMINATION OF EXTERNAL PRESSURE COEFFICIENTS 3.1 DETERMINATION OF WALL PRESSURE COEFFICIENTS TABLE 8A-1 WALL PRESSURE COEFFICIENTS |
174 | 3.2 DETERMINATION OF ROOF PRESSURE COEFFICIENTS TABLE 8A-2 ROOF PRESSURE COEFFICIENTS 3.3 DETERMINATION OF PARAPET PRESSURE COEFFICIENTS TABLE 8A-3 PARAPET PRESSURE COEFFICIENTS |
175 | 4. APPLICATION OF WIND PRESSURES 4.1 DETERMINATION OF DESIGN WIND PRESSURES TABLE 8A-4 SUMMARY OF WIND PRESSURES |
176 | TABLE 8A-4 SUMMARY OF WIND PRESSURES (continued) |
177 | 5. VERTICAL DISTRIBUTION OF WIND LOADS TO DIAPHRAGMS 5.1 VERTICAL DISTRIBUTION OF WIND LOADS TO DIAPHRAGMS TABLE 8A-5 WIND FORCES AT EACH DIAPHRAGM LEVEL |
178 | 6. HORIZONTAL DISTRIBUTION OF WIND LOADS TO BRACED FRAMES 6.1 FLEXIBLE VS RIGID DIAPHRAGMS 6.2 DETERMINATION OF CENTER OF MASS AND CENTER OF RIGIDITY 6.3 HORIZONTAL DISTRIBUTION OF WIND LOADS TO BRACED FRAMES |
179 | 7. DESIGN WIND LOAD CASES 7.1 DESIGN WIND LOAD CASE 1 |
180 | 7.2 DESIGN WIND LOAD CASE 2 TABLE 8A-6 LOAD CASE 2 |
181 | 7.3 DESIGN WIND LOAD CASES 3 AND 4 8. ITEMS NOT ADDRESSED IN THIS EXAMPLE |
182 | DESIGN EXAMPLE 8B COMPONENTS AND CLADDING WIND FORCES ON A THREE-STORY, L-SHAPED BUILDING OVERVIEW OUTLINE |
183 | 1. BUILDING LOCATION, USE, AND GEOMETRY 1.1 GIVEN INFORMATION |
184 | FIGURE 8B-1 TYPICAL FLOOR FRAMING PLAN |
185 | FIGURE 8B-2 ROOF FRAMING PLAN |
186 | FIGURE 8B-3 TYPICAL BUILDING SECTION AN EXTERIOR WALL |
187 | 2. CALCULATION OF VELOCITY PRESSURES 2.1 DETERMINATION OF RISK CATEGORY 2.2 DETERMINATION OF BASIC WIND SPEED 2.3 DETERMINATION OF WIND DIRECTIONALITY FACTOR |
188 | 2.4 DETERMINATION OF EXPOSURE CATEGORY 2.5 DETERMINATION OF TOPOGRAPHIC FACTOR 2.6 DETERMINATION OF GROUND ELEVATION FACTOR |
189 | 2.7 DETERMINATION OF GUST EFFECT FACTOR 2.8 DETERMINATION OF MEAN ROOF HEIGHT AND VELOCITY PRESSURE EXPOSURE COEFFICIENT |
190 | 2.9 DETERMINATION OF VELOCITY PRESSURE 3. DETERMINATION OF EXTERNAL PRESSURE COEFFICIENTS 3.1 DETERMINATION OF EFFECTIVE WIND AREAS TABLE 8B-1 EFFECTIVE WIND AREAS OF BUILDING ELEMENTS |
191 | 3.2 DETERMINATION OF END ZONE WIDTHS 3.3 DETERMINATION OF WALL PRESSURE COEFFICIENTS TABLE 8B-2 WALL PRESSURE COEFFICIENTS |
192 | 3.4 DETERMINATION OF ROOF PRESSURE COEFFICIENTS TABLE 8B-3 ROOF PRESSURE COEFFICIENTS 3.5 DETERMINATION OF PARAPET PRESSURE COEFFICIENTS TABLE 8B-4 PARAPET PRESSURE COEFFICIENTS |
193 | 4. APPLICATION OF WIND PRESSURES EQUATION 30.3-1 4.1 DETERMINATION OF DESIGN WIND PRESSURE FOR A TYPICAL EXTERIOR STUD TABLE 8B-5 C&C WIND PRESSURES FOR A TYPICAL EXTERIOR STUD 4.2 DETERMINATION OF DESIGN WIND PRESSURE FOR A THIRD-FLOOR STUD WITH A PARAPET TABLE 8B-6 C&C WIND PRESSURES FOR A THIRD-FLOOR STUD WITH PARAPET |
194 | 4.3 DETERMINATION OF DESIGN WIND PRESSURE FOR A TYPICAL ROOF FRAMING MEMBER TABLE 8B-7 C&C WIND PRESSURES FOR A TYPICAL ROOF FRAMING MEMBER 4.4 DETERMINATION OF DESIGN WIND PRESSURE FOR WALL CLADDING TABLE 8B-8 C&C WIND PRESSURES FOR WALL CLADDING 4.5 DETERMINATION OF DESIGN WIND PRESSURE FOR ROOF CLADDING TABLE 8B-9 C&C WIND PRESSURES FOR ROOF CLADDING |
195 | 4.6 DETERMINATION OF DESIGN WIND PRESSURE FOR A WINDOW UNIT TABLE 8B-10 C&C WIND PRESSURES FOR A WINDOW UNIT 4.7 USE OF C&C WIND PRESSURES FOR STRUCTURAL DESIGN 5. ITEMS NOT ADDRESSED IN THIS EXAMPLE |
196 | DESIGN EXAMPLE 9 DESIGN WIND FORCES FOR A 14-STORY OFFICE BUILDING OVERVIEW OUTLINE 1. PROBLEM STATEMENT 1.1 USE THE WIND LOADS PROVISIONS TO DETERMINE |
197 | FIGURE 9-1 EXAMPLE BUILDING PLAN, ELEVATION, AND DIMENSIONS 2. SOLUTION 2.1 MWFRS |
198 | FIGURE 9-2 STEPS TO DETERMINE MWFRS WIND LOADS FOR ENCLOSED, PARTIALLY ENCLOSED, AND OPEN BUILDINGS OF ALL HEIGHTS, TABLE 27.2-1 |
199 | EQUATION 26.10-1 |
200 | FIGURE 9-3 VELOCITY PRESSURE EXPOSURE COEFFICIENTS, Kh, AND Kz, TABLE 26.10-1 2.2 EVALUATION OF GUST EFFECT FACTOR, G OR Gf |
201 | EQUATION 26.11-2 TABLE 9-1 BUILDING AND ENVIRONMENTAL ATTRIBUTES TABLE 9-2 TERRAIN EXPOSURE CONSTANTS FOR FLEXIBLE BUILDING CALCULATIONS-EXPOSURE B ( TABLE 26.11-1 ) |
202 | TABLE 9-3 CALCULATED PARAMETERS FOR FLEXIBLE BUILDING CALCULATIONS 2.3 EVALUATION OF DESIGN WIND PRESSURE EQUATION 27.3-1 |
203 | TABLE 9-4 WALL PRESSURE COEFFICIENTS, Cp (FIGURE 27.3-1) |
204 | TABLE 9-5 CALCULATION OF STORY NET PRESSURES |
205 | FIGURE 9-4 STORY NET PRESSURES 2.4 COMPONENT AND CLADDING PRESSURES EQUATION 30.5-1 |
206 | FIGURE 9-5 WIND PRESSURE ZONES (ASCE FIGURE 30.5-1) TABLE 9-6 CALCULATION OF DESIGN WIND PRESSURE FOR COMPONENTS AND CLADDING |
207 | 3. DISCUSSION 3.1 FLEXIBLE STRUCTURE 3.2 IMPACT OF PODIUM 3.3 WIND TUNNEL TEST 3.4 EFFECTIVE AREA FOR DESIGN OF COMPONENTS AND CLADDING |
208 | DESIGN EXAMPLE 10 ROOFTOP SOLAR PANELS FOR BUILDINGS OF ALL HEIGHTS WITH FLAT ROOFS OR GABLE OR HIP ROOFS WITH SLOPES LESS THAN 7 DEGREES-SMALL COMMERCIAL BUILDING OVERVIEW |
209 | OUTLINE |
210 | 1. BUILDING GEOMETRY AND LOADS 1.1 GIVEN INFORMATION |
211 | FIGURE 10-1 ELEVATION VIEW FIGURE 10-2 PLAN VIEW |
212 | 2. WIND DESIGN FIGURE 10-3 ARAY TOP VIEW |
213 | 2.1 CODE DESIGN APPLICABILITY TABLE 10-1 CODE DESIGN APPLICABILITY |
214 | 2.2 VELOCITY PRESSURE TABLE 26.9-1 |
215 | EQUATION 26.10-1 2.3 DETERMINING EFFECTIVE AND NORMALIZED WIND AREAS |
217 | 2.4 PARAPET HEIGHT FACTOR 2.5 PANEL CHORD FACTOR 2.6 EXPOSURE FACTOR |
219 | FIGURE 10-4 ARRAY TOP VIEW WITH DEFINED AREAS FIGURE 10-5 ARRAY TOP VIEW WITH DEFINED AREAS |
221 | 2.7 NOMINAL NET PRESSURE COEFFICIENT TABLE 10-2 (GCrn)nom EQUATIONS |
222 | TABLE 10-3 (GCrn)nom CALCULATION 2.8 NET PRESSURE COEFFICIENT EQUATION 29.4-6 |
223 | TABLE 10-4 NET EXPOSURE COEFFICIENT (GCrn) CALCULATION 2.9 DESIGN WIND PRESSURE EQUATION 29.4-5 2.9.1 SOLAR PANEL DESIGN |
224 | TABLE 10-5 SOLAR PANEL DESIGN WIND LOAD CALCULATION 2.9.2 SOLAR PANEL TO TRAY CONNECTION DESIGN TABLE 10-6 SOLAR PANEL TO TRAY CONNECTION DESIGN WIND LOAD CALCULATION |
225 | 2.9.3 TRAY TO ROOF DESIGN FIGURE 10-6 ARRAY TOP VIEW WITH DEFINED SHARING AREAS |
226 | TABLE 10-7 BALLAST DESIGN WIND LOAD CALCULATION |
227 | TABLE 10-8 SOLAR PANEL DESIGN POINT LOAD CALCULATION |
228 | 2.10 ROOF DESIGN 2.10.1 BALLASTED ARRAYS 2.10.2 ATTACHED ARRAYS |
229 | 3. ITEMS NOT ADDRESSED IN THIS DESIGN EXAMPLE 4. REFERENCES |
230 | DESIGN EXAMPLE 11 ROOFTOP SOLAR PANELS OF ALL HEIGHTS WITH FLAT OR GABLE OR HIP ROOFS WITH SLOPES LESS THAN 7 DEGREES-LARGE COMMERCIAL BUILDING OVERVIEW OUTLINE 1. BUILDING GEOMETRY AND LOADS 1.1 GIVEN INFORMATION |
231 | FIGURE 11-1 ELEVATION VIEW |
232 | FIGURE 11-2 PLAN VIEW 2. WIND DESIGN |
233 | FIGURE 11-3 ARRAY TOP VIEW |
234 | 2.1 CODE DESIGN APPLICABILITY TABLE 11-1 CODE DESIGN APPLICABILITY |
235 | 2.2 VELOCITY PRESSURE TABLE 26.9-1 |
236 | EQUATION 26.10-1 2.3 DETERMINING EFFECTIVE AND NORMALIZED WIND AREAS |
237 | 2.4 PARAPET HEIGHT FACTOR |
238 | 2.5 PANEL CHORD FACTOR 2.6 EXPOSURE FACTOR |
239 | FIGURE 11-4 ARRAY TOP VIEW WITH DEFINED AREAS |
240 | FIGURE 11-5A ARRAY 1S TOP VIEW WITH DEFINED AREAS |
242 | FIGURE 11-5B ARRAY 1C TOP VIEW WITH DEFINED AREAS |
243 | FIGURE 11-5C ARRAY TOP VIEW WITH DEFINED AREAS |
244 | 2.7 NOMINAL NET PRESSURE COEFFICIENT |
245 | TABLE 11-2 (GCrn)nom EQUATIONS TABLE 11-3 (GCrn)nom CALCULATION 2.8 NET PRESSURE COEFFICIENT EQUATION 29.4-6 |
246 | TABLE 11-4 NET EXPOSURE COEFFICIENT (GCrn) CALCULATION 2.9 DESIGN WIND PRESSURE EQUATION 29.4-5 2.9.1 SOLAR PANEL DESIGN TABLE 11-5 SOLAR PANEL DESIGN WIND LOAD CALCULATION |
247 | 3. ITEMS NOT ADDRESSED IN THIS DESIGN EXAMPLE 4. REFERENCES |
248 | DESIGN EXAMPLE 12 ROOFTOP SOLAR PANELS PARALLEL TO THE ROOF SURFACE ON BUILDINGS OF ALL HEIGHTS AND ROOF SLOPES – SINGLE FAMILY RESIDENCE OVERVIEW |
249 | OUTLINE 1. BUILDING GEOMETRY AND LOADS 1.1 GIVEN INFORMATION |
250 | FIGURE 12-1 ELEVATION VIEW FIGURE 12-2 PLAN VIEW |
251 | 2. WIND DESIGN FIGURE 12-3 ARRAY TOP VIEW |
252 | 2.1 CODE DESIGN APPLICABILITY TABLE 12-1 CODE DESIGN APPLICABILITY |
253 | 2.2 VELOCITY PRESSURE TABLE 26.9-1 |
254 | EQUATION 26.10-1 2.3 DETERMINING EFFECTIVE WIND AREAS |
255 | FIGURE 12-4 ARRAY FRAMING VIEW |
256 | TABLE 12-2 EFFECTIVE AREA (A) FOR RAIL TO ROOF CONNECTION 2.4 EXTERNAL PRESSURE COEFFICIENT |
257 | FIGURE 30.3-2C |
258 | TABLE 12-3 GCp CALCULATION 2.5 EXPOSURE FACTOR |
259 | FIGURE 12-5 ARRAY TOP VIEW WITH DEFINED AREAS |
260 | FIGURE 12-6 ARRAY FRAMING VIEW WITH DEFINED GCp FACTORS ON PANELS |
261 | 2.6 SOLAR ARRAY PRESSURE EQUALIZATION FACTOR |
262 | TABLE 12-4 PRESSURE EQUALIZATION FACTOR |
263 | 2.7 DESIGN WIND PRESSURE EQUATION 29.4-7 FIGURE 12-7 SOLAR ARRAY DEPICTION SHOWING PANEL TO RAIL CONNECTION 2.7.1 SOLAR PANEL DESIGN |
264 | TABLE 12-5 SOLAR PANEL DESIGN WIND LOAD CALCULATION 2.7.2 SOLAR PANEL TO RAIL CONNECTION DESIGN |
265 | TABLE 12-6 SOLAR PANEL TO RAIL CONNECTION DESIGN WIND LOAD CALCULATION 2.7.3 RAIL DESIGN |
266 | TABLE 12-7 RAIL DESIGN WIND LOAD CALCULATION |
267 | 2.7.4 RAIL TO ROOF CONNECTION DESIGN FIGURE 12-8 ARRAY FRAMING VIEW |
268 | FIGURE 12-9 SOLAR ARRAY DEPICTION SHOWING RAIL TO ROOF CONNECTIONS TABLE 12-8 RAIL TO ROOF CONNECTION DESIGN WIND LOAD CALCULATION |
269 | 2.8 ROOF DESIGN 3. ITEMS NOT ADDRESSED IN THIS DESIGN EXAMPLE |
270 | 4. REFERENCES |
272 | DESIGN EXAMPLE 13 ROOFTOP SOLAR PANELS PARALLEL TO ROOF SURFACE ON BUILDINGS OF ALL HEIGHTS AND ROOF SLOPES SPORTS COMPLEX OVERVIEW OUTLINE 1. BUILDING GEOMETRY AND LOADS 1.1 GIVEN INFORMATION |
273 | FIGURE 13-1 ELEVATION VIEW |
274 | FIGURE 13-2 PLAN VIEW 2. WIND DESIGN |
275 | FIGURE 13-3 ARRAY TOP VIEW |
276 | 2.1 CODE DESIGN APPLICABILITY TABLE 13-1 CODE DESIGN APPLICABILITY |
277 | 2.2 VELOCITY PRESSURE TABLE 26.9-1 |
278 | EQUATION 26.10-1 2.3 DETERMINING EFFECTIVE WIND AREAS 2.4 EXTERNAL PRESSURE COEFFICIENT |
279 | FIGURE 30.3-2C TABLE 13-2 GCp CALCULATION |
280 | 2.5 EXPOSURE FACTOR |
281 | FIGURE 13-4 ARRAY TOP VIEW |
282 | FIGURE 13-5A ARRAY 1W TOP VIEW |
283 | FIGURE 13-5B ARRAY 1E TOP VIEW |
285 | FIGURE 13-5C ARRAY 2W TOP VIEW |
286 | FIGURE 13-5D ARRAY 2E TOP VIEW |
287 | FIGURE 13-5E ARRAY 3C TOP VIEW |
289 | 2.6 SOLAR ARRAY PRESSURE EQUALIZATION FACTOR TABLE 13-3 PRESSURE EQUALIZATION FACTOR 2.7 DESIGN WIND PRESSURE EQUATION 29.4-7 2.7.1 SOLAR PANEL DESIGN |
290 | TABLE 13-4 SOLAR PANEL DESIGN WIND LOAD CALCULATION 2.8 DISCUSSION |
291 | 3. ITEMS NOT ADDRESSED IN THIS DESIGN EXAMPLE 4. REFERENCES |
292 | DESIGN EXAMPLE 14 SEISMIC DESIGN OF A LOW-PROFILE UNATTACHED SOLAR PV SYSTEM ON A LOW SLOPE ROOF OVERVIEW OUTLINE 1. SOLAR ARRAY GEOMETRY AND LOADS 1.1 GIVEN INFORMATION |
293 | FIGURE 14-1 ARRAY |
294 | 2. SEISMIC DESIGN 2.1 EVALUATE SEISMIC REQUIREMENTS FOR PERMITTING UNATTACHED SOLAR ARRAYS ON THE ROOF 2.2 EVALUATE WHETHER THE ARRAY IS ADEQUATELY LOW-PROFILE 2.3 DETERMINE THE DESIGN SEISMIC DISPLACEMENT δmpv OF THE ARRAY EQUATION 13.6-1 |
295 | 2.4 DETERMINE THE MINIMUM SEPARATION BETWEEN ADJACENT ARRAYS 2.5 DETERMINE THE MINIMUM SEPARATION BETWEEN THE ARRAY AND A FIXED OBJECT ON THE ROOF 2.6 DETERMINE THE AMOUNT OF DIFFERENTIAL MOVEMENT THAT MUST BE ACCOMMODATED BY ALL ELECTRICAL CABLES THAT LEAD FROM ONE ARRAY TO ANOTHER ARRAY, OR FROM AN ARRAY TO A FIXED POINT ON THE ROOF 2.7 DETERMINE THE MINIMUM SEPARATION BETWEEN THE ARRAY AND THER ROOF EDGE |
296 | 2.8 DETERMINE THE REQUIRED SEISMIC INTERCONNECTION STRENGTH WITHIN THE ARRAY |
297 | 2.9 DETERMINE THE REQUIRED STRENGTH OF MEMBERS WITHIN THE ARRAY TO TRANSMIT SEISMIC FORCES TO EACH SUPPORT EQUATION 13.3-1 |
298 | 3. DISCUSSION 4. REFERENCES |
300 | DESIGN EXAMPLE 15 CONSIDERATION OF GRAVITY LOADS ON EXISTING ROOFS SUPPORTING SOLAR PV ARRAYS OVERVIEW OUTLINE |
301 | FIGURE 15-1 HISTOGRAM OF TYPICAL SOLAR PV AND SOLAR THERMAL PANEL WEIGHTS 1. DESIGN CONSIDERATIONS 1.1 ROOF LIVE LOADS |
302 | FIGURE 15-2 ROOF LIVE LOAD CAN BE OMITTED WHERE THE CLEAR DISTANCE FROM TOP OF ROOF TO UNDERSIDE OF PANELS IS NO MORE THAN 24 INCHES 1.2 ROOF LIVE LOAD OFFSET |
303 | 1.3 CONCENTRATED LOADS FIGURE 15-3 IN WOOD FRAMED ROOFS, ROOF SHEATHING INTERCONNECTS RAFTERS SO THAT A CONCENTRATED LOAD ON ONE RAFTER TENDS TO BE SHARED WITH ADJACENT RAFTERS 1.4 CONCRETE SLAB AND STEEL FRAMED ROOFS |
304 | 1.5 WOOD FRAMED ROOFS 1.5.1 TIMBER TRUSSES 1.6 CHANGES SINCE ORIGINAL DESIGN AND CONSTRUCTION |
305 | 1.7 NOMENCLATURE 2. EXAMPLE: EXISTING WOOD FRAMED ROOFS 2.1 GIVEN INFORMATION 2.1.1 LOCATION |
306 | 2.1.2 SOLAR PV LOAD CASES |
307 | FIGURE 15-4 THREE KINDS OF PV ARRAYS AND ASSOCIATED LOAD CASES |
308 | FIGURE 15-5 COMMERCIAL BUILDING A ROOF FRAMING, SUPPORTING PV-1 TYPE OF ARRAY AND LOADING |
309 | 2.1.3 WIND VELOCITY PRESSURE 2.1.4 WIND DOWN LOAD ON ORIGINAL BUILDING, AND UNCOVERED AREAS BETWEEN PV PANELS 2.2 WIND DOWN LOAD ON JOISTS FOR THE PV-1 LOAD CASE |
310 | 2.3 WIND DOWN LOAD ON JOISTS FOR THE PV-2 LOAD CASE |
313 | FIGURE 15-6 FLAT ROOF WIND ZONES FOR AREAS (A) COVERED BY SOLAR PANEL AND (B) NOT COVERED BY SOLAR PANELS |
314 | 2.4 WIND DOWN LOAD ON JOISTS FOR THE PV-3 LOAD CASE 2.5 WIND UPLIFT ON ROOF JOISTS |
315 | 2.5.1 WIND UPLIFT ON MOUNTS |
317 | 2.6 SNOW LOADS 3. GENERALIZATION OF LOADING |
318 | FIGURE 15-7 MOMENTS ON JOISTS RESULTING FROM CONCENTRATED LOAD FROM PV PANEL MOUNTS 3.1 COMPARISON OF GENERALIZED LOADS |
319 | TABLE 15-1 LOAD COMBINATIONS |
320 | 3.2 CONCENTRATED LOAD SHARING FACTOR |
321 | FIGURE 15-8 CONCENTRATED LOAD SHARING FACTOR AS A FUNCTION OF THE SHEATHING/RAFTER RELATIVE STIFFNESS RATIO TABLE 15-2 SHEATHING/RAFTER RELATIVE STIFFNESS RATIOS FOR CALCULATING |
322 | TABLE 15-3 SMEARED UNIFORM LOAD |
323 | 3.3 COMPARING LOAD CASES |
324 | TABLE 15-4 EQUIVALENT UNIFORM JOIST LOADS, BOTH CORRECTED AND UNCORRECTED FOR LOAD DURATION, FOR COMMERCIAL BUILDINGS A AND B |
325 | 3.4 DEMAND-CAPACITY RATIOS (DCRS) |
326 | TABLE 15-5 COMMERCIAL BUILDING A SHOWING LOAD CASES AND RESULTING STRESSES Fb AND DEMAND CAPACITY RATIOS DCR |
327 | TABLE 15-6 COMMERCIAL BUILDING B SHOWING LOAD CASES AND RESULTING STRESSES, fb AND DEMAND CAPACITY RATIOS, DCR |
328 | 4. EVALUATION TRIGGERS 4.1 GRAVITY TRIGGER-ROOF JOISTS 4.2 GRAVITY TRIGGERS-GIRDERS AND COLUMNS |
329 | 4.3 FOUNDATIONS 4.4 SEISMIC TRIGGERS 5. SUMMARY OF ROOF JOIST GRAVITY EVALUATION |
330 | 5.1 SHEAR 5.2 CONNECTIONS 5.3 DEFLECTIONS 5.4 PONDING 5.5 DISCUSSION OF TABLES 15-5 AND 15-6 5.5.1 JOIST DEPTH |
331 | FIGURE 15-9 A STAGGERED MOUNT LAYOUT CREATES A QUASI-UNIFORM LOAD ON THE ROOF JOISTS |
332 | 5.5.2 CONCENTRATED LOADS 5.5.3 DCRS GREATER THAN ONE 6. CONCLUSIONS |
333 | 7. REFERENCES |
336 | DESIGN EXAMPLE 16 CARPORT SOLAR PV SYSTEMS OVERVIEW OUTLINE |
337 | FIGURE 16-1 FRAMING PLAN |
338 | FIGURE 16-2 ELEVATION |
339 | 1. BUILDING GEOMETRY AND LOADS 1.1 GIVEN INFORMATION TABLE 4-1 TABLE 26.10-1 |
340 | 1.2 ROOF LIVE LOADS 1.3 SEISMIC DESIGN FORCES |
341 | TABLE 12.2-1.G-2 EQUATION 12.8-1 1.4 WIND DESIGN FORCES (MWFRS) |
342 | TABLE 16-1 MWFRS NET PRESSURE COEFFICIENTS FOR CLEAR WIND FLOW TABLE 16-2 MWFRS NET DESIGN PRESSURES FOR CLEAR WIND FLOW |
343 | FIGURE 16-3 SUMMARIZES THE NET DESIGN PRESSURES DISTRIBUTION ON THE CROSS BEAM FIGURE 16-3 MWFRS WIND LOADING DIAGRAM |
344 | 1.5 COMBINATIONS OF LOADS (MWFRS) 1.6 DESIGN REQUIREMENTS FOR MWFRS |
345 | FIGURE 16-4 APPLIED FORCE DIAGRAM TABLE 16-3 JOINT LOADS |
346 | 1.7 WIND DESIGN FORCES (C&C) EQUATION 30.7-1 EQUATION 26.10-1 FIGURE 16-5 SUMMARY OF C&C ZONES |
347 | TABLE 16-4 C&C NET PRESSURE COEFFICIENTS FOR CLEAR WIND FLOW TABLE 16-5 C&C NET DESIGN PRESSURES FOR CLEAR WIND FLOW |
349 | 1.8 COMBINATIONS OF LOADS (C&C) TABLE 16-6 DISTRIBUTED LOADS (y-axis/z-axis) plf |
350 | FIGURE 16-6 LOAD, SHEAR, AND BENDING MOMENT DIAGRAMS FOR D+0.6W |
351 | 2. ADDITIONAL CONSIDERATIONS 2.1 FOUNDATIONS 2.2 WIND LOADS ACTING ON BEAMS, COLUMNS, AND PURLINS 2.3 SNOW LOADING FIGURE 16-7 UNBALANCED SNOW LOADING DIAGRAM |
352 | FIGURE 16-8 PARTIAL SNOW-LOADING DIAGRAM 2.4 CARPORTS WITH A TILT LESS THAN 5 DEGREES |
353 | 2.5 WIND LOADING ON TRANSVERSE FRAMES |
354 | ICC EVALUATION SERVICE |
355 | HELPFUL RESOURCES FOR YOUR IBC® |