bellecory15
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- May 27, 2015
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[SIZE=10.5pt]Hi Everybody![/SIZE]
[SIZE=10.5pt]I have a question about Chapter 28 (ASCE 7-10) and the simplified design wind pressure, Ps. I am having trouble understanding how to calculate Ps30 (Figure 28.6-1, pg 304).[/SIZE]
[SIZE=10.5pt]On page 303, there seems to be two cases: A and B, each case shows the difference sections that experience wind pressure (sections A-H). On the next page, pg 304, there are values for the horizontal (sections A-D), vertical pressures (section E-H), and overhangs.[/SIZE]
[SIZE=10.5pt]I have not been able to find a good example problem that explains step by step how to use this table...so here are my questions:[/SIZE]
[SIZE=10.5pt]When asked to calculate the simplified design wind pressure for a low rise building:[/SIZE]
[SIZE=10.5pt]1. Do I need to look at both cases, case A and B? or will the problem specify in what direction the wind is hitting the building?[/SIZE]
[SIZE=10.5pt]2. Do I need to use different values for case A vs case B? I only see one set of values on pg 304, I do not see one a set for when case A is applicable vs when case B is applicable. For instance, for case A, section A seems to be a different size from section A for case B. Do I use the same value listed under the Horizontal Pressure, A column for both cases?[/SIZE]
[SIZE=10.5pt]3. The value for Ps30, would it be the sum of all the pressures: horizontal, vertical, and overhangs, for a specific basic wind speed and roof angle? [/SIZE]
[SIZE=10.5pt]If someone has a good example problem, I would really appreciate it and you should share it![/SIZE]
[SIZE=10.5pt]Thank you so much for any help I can get on this.[/SIZE]
[SIZE=10.5pt]I have a question about Chapter 28 (ASCE 7-10) and the simplified design wind pressure, Ps. I am having trouble understanding how to calculate Ps30 (Figure 28.6-1, pg 304).[/SIZE]
[SIZE=10.5pt]On page 303, there seems to be two cases: A and B, each case shows the difference sections that experience wind pressure (sections A-H). On the next page, pg 304, there are values for the horizontal (sections A-D), vertical pressures (section E-H), and overhangs.[/SIZE]
[SIZE=10.5pt]I have not been able to find a good example problem that explains step by step how to use this table...so here are my questions:[/SIZE]
[SIZE=10.5pt]When asked to calculate the simplified design wind pressure for a low rise building:[/SIZE]
[SIZE=10.5pt]1. Do I need to look at both cases, case A and B? or will the problem specify in what direction the wind is hitting the building?[/SIZE]
[SIZE=10.5pt]2. Do I need to use different values for case A vs case B? I only see one set of values on pg 304, I do not see one a set for when case A is applicable vs when case B is applicable. For instance, for case A, section A seems to be a different size from section A for case B. Do I use the same value listed under the Horizontal Pressure, A column for both cases?[/SIZE]
[SIZE=10.5pt]3. The value for Ps30, would it be the sum of all the pressures: horizontal, vertical, and overhangs, for a specific basic wind speed and roof angle? [/SIZE]
[SIZE=10.5pt]If someone has a good example problem, I would really appreciate it and you should share it![/SIZE]
[SIZE=10.5pt]Thank you so much for any help I can get on this.[/SIZE]