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Bryan G
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| Joined: | Fri Sep 22nd, 2006 |
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| Posts: | 12 |
| Exams Taken: | PD, ME, BD/MM, CD, SP, BP, BT | | Exams Passed: | PD, ME, BD/MM, CD, BP, BT | | Describes Me: | |
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Posted: Tue Aug 12th, 2008 06:44 pm |
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I ned some help on solving Truss reactions. Does anyone know any rules of thumb as far as determining which members are in tension or compression? I have tried to figure out both methods (sections and joints) and I am simply not getting it. It seems in the Method of Sections Method I understand all the vertical reactions when you break it down, but do not understand where horizontal numbers come from. Kaplan wasnt much help. I test in 2 days...Can someone point me in a direction where it is explained clearly?
Thanks
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modulator
Member
| Joined: | Mon Aug 8th, 2005 |
| Location: | New Orleans, Louisiana USA |
| Posts: | 30 |
| Exams Taken: | GS, LF, ME, BD/MM, CD, SP, BP, BT | | Exams Passed: | ME, BD/MM, CD, SP, BP, BT | | Describes Me: | |
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Posted: Tue Aug 12th, 2008 10:46 pm |
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my suggestion: you need to learn how to solve for the individual members using method of joints &/or sections. then work out calcs for some different-typical-simple truss configurations to see how some rules of thumb develop. this can be done this evening.
all diag members have vert & horiz components. chords only have horiz forces. I hope this helps...
Last edited on Tue Aug 12th, 2008 10:48 pm by modulator
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tropical-hut
Member
| Joined: | Sat Jul 19th, 2008 |
| Location: | City Of Angels |
| Posts: | 52 |
| Exams Taken: | PD, GS, LF, ME, BD/MM, CD, SP, BP, BT | | Exams Passed: | PD, GS, LF, ME, BD/MM, CD, SP, BP, BT | | Describes Me: | Just about time...beat 3.1! yes... |
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Posted: Tue Aug 12th, 2008 11:34 pm |
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Bryan G wrote: I ned some help on solving Truss reactions. Does anyone know any rules of thumb as far as determining which members are in tension or compression? I have tried to figure out both methods (sections and joints) and I am simply not getting it. It seems in the Method of Sections Method I understand all the vertical reactions when you break it down, but do not understand where horizontal numbers come from. Kaplan wasnt much help. I test in 2 days...Can someone point me in a direction where it is explained clearly?
Thanks
Check the ftp site, Thaddeus seminar
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Bryan G
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| Joined: | Fri Sep 22nd, 2006 |
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| Posts: | 12 |
| Exams Taken: | PD, ME, BD/MM, CD, SP, BP, BT | | Exams Passed: | PD, ME, BD/MM, CD, BP, BT | | Describes Me: | |
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Posted: Wed Aug 13th, 2008 12:45 am |
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| Thanks to the both of you....I found the seminar notes and they have helped tremendously. I appreciate your help....wish me luck...now back to a good 24 hours of cramming....
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imnothavingfun
Member
| Joined: | Tue Jul 22nd, 2008 |
| Location: | USA |
| Posts: | 9 |
| Exams Taken: | PD, GS, BD/MM, CD | | Exams Passed: | PD, BD/MM, CD | | Describes Me: | |
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Posted: Wed Aug 13th, 2008 01:59 pm |
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| Go on-line (google Marc Mitalski) - he has a site called something like prep-are.com) - You can listen to a free 30 minute discussion on trusses which you will find invaluable. Good luck tomorrow.
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