engineeredAF

@emm0sh AISC has all kinds of rules for bolt spacing, flange thickness, to ensure the friction rules apply. also material and flange prep if you want to up the friction coefficient. we've been building skyscrapers before FEA was invented so this stuff is pretty well established.

@EngineeredAf yeah at the end of the day “failure” still is super robust most likely maybe you can do stiffness analysis for slip critical and rely on the bolt shear for skookum loading

i always found it frustrating in composite beam design that, when calculating shear flow, the bolted joints don’t grant some extra “oomph” through the friction generated between the layers warning: this doesn’t apply to screws or adhesive, just bolts it could be negligible, but, i could also imagine a world in which the net friction force resisting longitudinal shear is greater than the resistive shear of the bolts themselves thinking through the extremes: if you had lubricated beams (µ ~= 0) with high preload, you still have non-composite action but if you had a µ of 1 in Ff = Nµ with that preload, the bolts would see zero shear! what does this mean? if the bolted joint is slip critical, then your composite beam acts compositely why is this useful? well, most of the time you wouldn’t rely on this design mechanism. but if you’re in a pinch and need a little extra safety factor, i could see a version of this analysis getting you there if you model the beam as a hybrid of the two modes of behavior

@yacineMTB apparantly i've been saying eid wrong my entire life

Eid mubarak

@Gaurab i'm about to buy up every billboard on 90. wanna buy some gaskets?

We spent $15,000 on billboards targeting one person: the guy controlling all the chemical spend at a saltwater disposal company in Texas. We mapped his commute and bought every billboard between his house and the oil field. When we finally called, he said "I see your billboards everywhere." That landed us our first oil field contract. At the time our entire operation was a $10,000 reactor built from PVC pipes from Home Depot, turning corn sugar into industrial chemicals. People keep trying to throw it away. It still works. That leaking reactor started a multibillion-dollar company. @ycombinator visited our plant in Houston. The original PVC reactor is still on the floor next to the Bioforge.

The best part of the distributor business model (as a mfr) is not having to deal with this bs

@faraz_r_khan @sdamico @garrytan

@EngineeredAf @sdamico @garrytan Haha yes. Shame would’ve been his since I have slack history and there’s people working with me who have delivered production vehicles - unlike him 😂

we’ve mostly dodged this but imagine if SpaceX had to hire “professional engineers” (this is a thing that has been largely evaded by Silicon Valley for decades) we would be grounded

@faraz_r_khan @sdamico @garrytan 🤣 that was you? I was wondering who the other side of that drama was about since he never named and shamed. So you got reported or what?

@sdamico @garrytan A Twitter famous mechanical engineer from Apple wanted me to hire a PE firm for my cargo bike or he would report me to the bpelsg 😂

@faraz_r_khan It’s a filter. If you see P.E, it means they can still do basic shit like a free body diagram - you don’t have to ask if they can. I’ve met degreed ME’s who thought psi was a force. They’re not stupid, they just took non-engineering roles after uni and lost all their powers.

If you see PE in a mechanical engineers bio - don’t hire them for your hardware startup. You’ll thank me later.

@Russell_MFG_USA Everyone needs exactly one bulldog like this guy in their factory. Not two. One.

Everyone rushing into manufacturing right now, let me drop some wisdom... Hire this guy. Keep him on a a bit of a leash. Let him vent every now and then. Regulate his exposure to new hires. Promise you that dude will move mountains for you...

@Druicide_ @RichOToole It never has

@RichOToole As a Houstonian my only gripe is… shipleys does not hold up the kolache standard anymore 🥲

And before the die hard Czech Kolache people come after me. I know a real kolache is made with fruit preserves and not meat and cheese. But in Houston we call this a Kolache.

@RichOToole I love shipleys but they actually make the worst kolaches in Texas. Microwaved hot dog bun

@jrhartman131 This is witchcraft. I must learn how

Our lasers are usually cutting acrylics but they’re good for scoring custom boxes too. We ship a part that needs a 48x9x30 box. Not too common of a size and the stock I found costs over 10% of our part cost. So we buy 4x8 sheets, cut to 77.25, use laser to score bend lines, then tape together. When I first bought the business they were manually scoring each of these bend lines with a box cutter and tape measure taking a day to get a dozen done…drew a few lines in lightburn and now this part of the process is an afterthought.

@jack_watson_hfw They’re an engineer’s dream - CAD models, massive inventory, material & technical specs all in list view. All relevant specification and zero sales fluff. The shipping is a bonus

My manufacturing hot take: I don’t understand the love affair with McMaster Carr. It is indeed a great business, but for minimally more effort, you can get the same material for half the price.

@RichOToole Teo’s slaps and tiempo heavily depends on location ie the 45s location is mid. Also try guadalajara upper Kirby area

Houston Fajitas Ranked: 1. El Tiempo 2. Ninfas 3. Alma 4. Lupe Tortilla 5. Little Pappasitos 6. Teotihuacan 7. Mexican Sugar 8. Goode Co Cantina 9. Hugo’s 10. Candente

@scottastronaut About $500 scrap value if they’re 316. My tenant left a bunch and I cried when my scrap guy told me they were only 304

You would think I would know, but what do you think these are worth? What is the best thing you could brew in them and start making cash?

@HustleBitch_ MEA is famously known for maintaining flights even into active conflicts. They’re like the Waffle House Index but for war.

Footage of a passenger plane taking off from Beirut at the exact same moment Israeli missiles were striking the city is going viral as more people realize what they were actually doing.

@amer_icon A few months ago I stumbled upon some of my sister’s old writings in the shop from when we were kids and sent a picture to her. Summer days in the 90’s haha

This was found on the other side of a door leading to the unused upper offices. My niece made these rules for the club house when she was a little girl. She's now married, her husband is my tech guru/office lead and she manages orders and shipping at our east location. Family.

Conference room remodel update. The truck series nose comes down and we found a window behind it. I feel like I need to keep a touch of wood paneling somewhere in here but the plan is to epoxy, paint and seal the concrete. I don't want a sterile office.

@CalebChamberla6 Nesting discount is clever nice job

Xometry vs OSH Cut. Same parts, same material. Xometry: 10 business day, $633.67, sent overseas OSH Cut: 3 business days, $177.96. Or ships tomorrow, for $322.96. Made in Utah. Xometry isn't profitable. 😕

@Xaraphim @Patrick_Maksoud 🍔

a few weeks ago @Patrick_Maksoud told me to try relish on a burger and it changed my life a little bit his food takes have been suspiciously correct ever since so we’re starting a food only group chat bring your culture, your recipes, your hidden gems, your family dishes, your street food recommendations, whatever you’ve got if you’re rude or hateful you’re out. this is a GOOD vibes food space, not a debate club the only rule is no british people (we’re not doing beans on toast in this house) drop a 🍔 if you want in

@sendcutsend Now we’re talkin

now cutting MIC-6 Cast Aluminum sheet in .250”, .375”, and .500”