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Ronald O. Hamburger, P.E., F.SEI

Simpson Gumpertz & Heger

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Simpson Gumpertz & Heger
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Ronald Hamburger, P.E., F.SEI


Simpson Gumpertz & Heger

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1 to 12 of 12 total
Posted By Ronald Hamburger 01-31-2023 07:59 PM
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Christian Parker's interpretation is correct. ------------------------------ Ronald Hamburger, SE Consulting Principal Simpson Gumpertz & Heger ------------------------------
Posted By Ronald Hamburger 01-20-2023 06:02 PM
Found In Community: Peer-to-Peer Standards Exchange
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John-  The ASCE 7 committee has not done serious evaluation of garage loading requirements since 2002 when the load was reduced from 50 psf to 40 psf.  However, Cole Graveen who heads the ASCE 7 Live Loads Subcommittee indicates that he has received a number of questions of this type recently, and he ...
Posted By Ronald Hamburger 01-17-2023 11:46 AM
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Dwayne, Per Don Scott, chair of the ASCE 7-16 wind committee, "Any extension of the roof structure beyond the face of the building wall is considered an overhang.  The overhang has higher wind loads because of the combination of suction pressures on top of the roof surface along with positive pressues ...
Posted By Ronald Hamburger 01-17-2023 11:42 AM
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William- I believe you are misinterpretting the figure and note.  Note 3 states that the soffit pressure, ps, is equal to the wall pressure pw, not that the wall pressure is dpeendent on the soffit pressure.  The arrows are shown in two different directions because just as with any location on the building ...
Posted By Ronald Hamburger 01-10-2023 02:37 PM
Found In Egroup: Peer-to-Peer Standards Exchange
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Scott When determining anchorage forces for mechanical or electrical equipment under ASCE 7-16, both the Rp and Omega-0 coefficients should be taken from the appropriate entry line in Table 13.6-1.  No further modification is appropriate.  You may wish to refer to ASCE 7-22 which contains updated procedures ...
Posted By Ronald Hamburger 11-03-2022 10:36 AM
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There will of course be wind pressure (both suction and compression) on the first floor level.  The reality is, however, that this is never likely to control the design.  I doubt that designers of these buildings consider it (but don't know).  The live load design for the floor (40 psf), factored by ...
Posted By Ronald Hamburger 09-04-2022 10:07 AM
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Christian,  As you are likely aware, the road to LRFD has been a long one, with some recent updates.  The road starts back in the 1960s, when ACI introduced "Strength" design as an appendix in 318-64.  In 71 this became the primary method and ASD moved to an appendix.  Steel was next, in the 1970s ...
Posted By Ronald Hamburger 09-04-2022 10:06 AM
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Christian, as you note the  0.42 factor in IBC is historic and ties back to ASD design.  The ASCE 7 committee has not discussed updating this in IBC, but it could become a topic of discussion for the ASC 7-28 Committee, which will be formed in a few months.  Look for a call for volunteers interested ...
Posted By Ronald Hamburger 07-05-2022 11:29 AM
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Danielle - First ASCE does not develop building codes, it develops industry consensus standards, as do many other organizations including AISC, ACI, TMS, etc.  Many of these standards, e.g. ASCE 7, ASCE 41, ACI 318, AISC 360 are adopted by reference into the building codes, and once this occurs, to the ...
Posted By Ronald Hamburger 06-03-2022 03:19 PM
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ASCE 7-16 Commentary Section C13.4.6 states that for friction clips “under no circumstances should they be relied on to resist sustained gravity loads” because sustained gravity loads could slip out of the friction clip as the friction diminishes over time.  Please note that Section 13.4 states “component ...
Posted By Ronald Hamburger 06-03-2022 03:15 PM
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“The provisions of ASCE 7-16 Chapter 13 cannot be circumvented by not attaching nonstructural components to the structure. Components falling from structures have historically been responsible for many deaths and injuries. The intent of Chapter 13 is for these components to be anchored to the structure. ...
Posted By Ronald Hamburger 03-08-2022 09:37 PM
Found In Egroup: Professional and Career Topics
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George I cannot identify the calculation in the attachment to your message.  However, I presume you are familiar with the topographic effects factor Kzt in ASCE 7 Chapter 26.  Depending on the geometry of the terrain, and the location of the house relative to the slope, it is possible to see wind ...