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Maybe the difference is between what they feel is required by code (ie, the minimum permissible) versus the actual load it needs to support? 20psf seems ridiculously low, especially when a loading gallery for a theater is likely to be holding around 10 tons
of counterweight.</div>
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Given the dimensions of a steel counterweight (6" x 13" x 2") — two across and two high would be somewhere around 200 lbs/s.f., no? (Plus two burly stagehands....)</div>
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<div>Matthew Breton | <span style="color: rgb(153, 153, 153);">he, him, his</span></div>
<div>Design for Theater and Dance </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Stagecraft <stagecraft-bounces@theatrical.net> on behalf of Will Leonard via Stagecraft <stagecraft@theatrical.net><br>
<b>Sent:</b> Monday, June 2, 2025 11:10 AM<br>
<b>To:</b> stagecraft@theatrical.net <stagecraft@theatrical.net><br>
<b>Cc:</b> Will Leonard <will@istudioprojects.com><br>
<b>Subject:</b> [SML] Loading Bridge design...</font>
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<div>Howdy,</div>
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<div>We are doing an install on a building that was built in 1976 & I need some information from the experts on the List:</div>
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<div> With this project, we are having to work with an Architectural Firm who has no theater experience. We are having to explain to them how things are actually work/are used, which is not a problem because this is very common as we deal with remodels, etc.</div>
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<div>However, they are trying to tell us that the loading bridge is only designed for a Live Load of 20psf. This means that 1- we cannot build a scaffolding to reinforce the head steel (as they are requiring) but also that 2- the bridge cannot have the stage
weights stacked on it as it was (& has been since the building first opened). </div>
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<div>What I am looking for is if someone can quote (or direct me to where I can find) documentation that the building codes of the 1970s required Live Load ratings (150 psf? like the stage floor). I don't want the client to not be able to use their newly installed
counterweight system because of incorrect information, so I reach out to the group to see if I am crazy.</div>
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<div>Let me know what you think (dangerous request I know) ;) </div>
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<div dir="ltr">- Will Leonard
<div>Design Manager<br>
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<div>C: 281-752-1060</div>
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