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RE: Retaining Walls

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            Did you categorize the seismic load as an earthquake load (E) or as an additional lateral earth Pressure (H) in the factored load combinations?







Salvador Dorado

Project Engineer


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From: Garner, Robert [mailto:rgarner(--nospam--at)]
Sent: Monday, July 20, 2009 12:45 PM
To: seaint(--nospam--at)
Subject: RE: Retaining Walls


In the past, I have followed my geotech recommendations and he gave the active and seismic separately and I combined them in the factored load combinations.


Bob Garner, S.E.


From: Salvador Dorado [mailto:sdorado(--nospam--at)]
Sent: Monday, July 20, 2009 12:07 PM
To: seaint(--nospam--at)
Subject: Retaining Walls


I am designing a 9'-0" tall retaining wall with dead loads and live loads at the top of the stem. There are also seismic earth pressures on the wall. My question is: Does the wall have to be designed with the active earth pressure and the seismic earth pressure acting simultaneously? If so, does the seismic earth pressure need to be categorized as an Earthquake load (E) or a lateral earth pressure load (H) in the ASCE load combinations? Thank you in advance for the help.