Purdueenginerd
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Posts posted by Purdueenginerd
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14 hours ago, urbanize713 said:
On the flip side employers made actually need more space as open concept may be on the latest victim of Covid 19. I think one way or the other it is all conjecture. The overall effect will probably land somewhere in the middle like it always does.
I didnt even think about that. Oh how I loath open floor cube concepts.
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Ive been noticing this lately (in single family homes), and maybe the architects can chime in on it. But I've noticed more and more structures with painted black elements on the facade, and I was wondering if that has any deleterious effects on the energy efficiency of the building.
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Who's the architect of record on this?
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On 4/14/2020 at 9:19 AM, cspwal said:
That's a decent hike from the metro rail station for the college of medicine - especially with no direct trail to connect it
I wonder why the large setback from the road
I speculate this plot of land will be multiple buildings, all medicine related over the course of the next 20-30 years.-
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37 minutes ago, H-Town Man said:
I think that is just for the May contract, which ends tomorrow. Then we shift to the June contract, which is still in the low $20's I believe.
Ah okay, I believe youre correct.
oof
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As I hit enter, Oil hit 2 dollars a barrel. wow
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Oil just hit 5 dollars a barrel: Thats still going to be apocalyptic for the Texas Economy, even with the reduction of oil dependency over the last 40 years.
Part of this is demand driven, so presumably if COVID 19 starts to free up sectors of the economy by summer, demand might go back up some. But 5 dollars for a barrel is just not going to sustain many businesses at current production levels.
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1 minute ago, The Hills said:
I'm guessing your not at liberty to be more specific about the projects?
Thats correct. Sorry!
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We've now had a couple of larger jobs in design phase in Houston and Austin put on temporary hold by ownership. This will trickle own to construction eventually.
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@hindesky Those are post tension or prestress ports.
There are three times of structural concrete construction
1. Traditional Reinforced concrete
2. Post Tension Concrete
3. Pre-stress concrete
To understand the three, a brief cursory explainer on how structural concrete works. Concrete is very weak in tension, Great in compression! Lets talk about No. 1 first. In traditional concrete, lets imagine a simple concrete beam with no reinforcement (ie, rebar). Concrete, like every material on this planet, will bend. If you imagine a sagging beam, the bottom of the beam will be in tension, and the top of the beam will be in compression. With no rebar, the concrete will crack at the bottom and quick propagate upwards, splitting the beam in half and causing collapse. Ever see a martial artist break concrete block in half? This is exactly what is going on. Theyre impact is "flexing" the block, creating tension on the bottom face and subsequently breaking the block. In traditional reinforced concrete, rebar is added to the bottom of the beam to engage and resist those tensile forces.
Above is the cross section of a typical reinforced concrete beam design. I wont go into the equations too much, but you'll see that the top of the beam is in compression, the bottom of the beam is in tension (as denoted by C and T, respectively). Now what are the limitations for this? In traditional concrete construction, the tension zone effectively always exists, this limits how long the span is. In addition the more load you have on it, the "deeper" the beam required to create a sufficiently large concrete compression zone. For parking garages, is generally desirable to have long spans between columns because that means: more parking!
So what is post tension? When the concrete is cast, they create this holes all the way through the beam/girder all the way to the other end. While the structure is shored, they'll run these high strength cables through the beam and tie them at both ends. The cables are then tightened, aka, tensioned, and locked in place. The tension in the cables in effect "compresses" the concrete. Remember concrete is great in compression. Post tension effectively put more of the concrete section into compression. Advantages include the ability to go longer spans with less depth. Disadvantages: less modifiable and more expensive to build-- Can also be dangerous if a cable fails. To answer your question, those holes are for post tension cables.
Pre-stress is very similar in principle. You will most often see pre-stress concete in pre-cast garages. Prestress means that the cable was tensioned before the concrete was cast, then they poured the concrete and subsequently released the cables from tension, (which then applied a compression force on to the concrete. These are common at plant manufactured concrete shapes, that are trucked to the job site and put in place at the construction site. The disadvantages are similar to post tension.
As for why theyre working on an already existing garage: Not sure. unless it was to make repairs or modifications. associated with the builing that may go up next door. This garage looks like a pre-stress/precast garage.-
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I have a tiny repair project at a hotel. They are Howling about price for the repairs and trying to equivocate whether the repairs are needed. I imagine this is related.
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7 hours ago, Triton said:That's probably the exact thing that's going to have to happen. Unless there's some way to add extra supports but if there's a problem with the very foundation, I imagine they would have to demo and start over. @Purdueenginerd ?
My specialty isnt bridges, but it is important to note that the code that governs the structural engineering of bridges (AASHTO) is generally more stringent than the code(s) that cover buildings. The statement in the news article is alarming but sort of vague.
QuoteDesigners of the $1 billion Ship Channel Bridge project made faulty assumptions about the soil around the bridge’s critical supports above and below ground, did not properly account for winds on the stability of the supports and failed to factor in the weight of two-way traffic on the southbound span while the northbound structure is built, according to engineers hired by the county to review the plan.
A brief explainer on load combinations. In both the building code and bridge codes, the predominant system of design today is Load Resistant factored design. (In Wood, Masonry, Soils and some steel structures - the old system is still used sometimes,). Long Story short, the engineers classify different types of loads. I'll just use 3 for example, but there are a lot more.
Dead Load(DL) - Self weight of the building/structure
Live Load(LL)- typically a transient load/mobile load ie, people.
Wind load(W)- Pretty self explanatory.
The engineer takes those loads and applies factors to them. Then puts them in different combinations! For example, in the building code here are 4 combinations that you'll likely see.
- 1.4 * D = Factored Load 1
- 1.2 *D +1.6L = Factored load 2
- 1.2*D+1.0W+0.5L =factored load 3
- 0.9*D+1.0W = factored load 4
Then for each member in a building, the engineer will compare all the load combinations with the capacity. I'm only showing you 4 load combinations, but the structures I work on, its not unrealistic to have 20 to 30. Accounting for wind directions, uplift etc. This system results in "more efficiently" designed structures. A brief example fictitious example:
I have two buildings that weigh 2000 lbs: 1 building has to hold up a 1000 lb statue. The 2nd building has to hold up a dance floor with for 1000 lbs of people.
Building 1, per code, would have to be designed for 1.4*(3000lbs) = 4200lbs
Building 2, per code, would have to be designed for 1.2*2000lbs +1.6(1000lbs) =4000 lbs
The reason i'm goign through this giant explanation is that the bridge code, has even more load combinations. Including load combinations on specific lanes loaded, and other lanes unloaded. They got load combos that include vehicle braking force, thermal force, wind, seismic, ice, rain, snow, the list goes on.
Quotefailed to factor in the weight of two-way traffic on the southbound span while the northbound structure is built
What this sounds like to me: They missed a load combo. Does it mean it will fail? Not necessarily. It sounds like theres a potential for damage during a load imbalance. Which may get remedied by restricting the amount of lanes in the south bound span until the other span is complete.
Quotefaulty assumptions about the soil around the bridge’s critical supports above and below ground, did not properly account for winds on the stability of the supports
This is the more concerning to me. The soils part is a bit alarming, because I would presume a pretty substantial geotechnical report was performed for this test. I would imagine they have cut into a bit of their factor of safety for one of the load combinations. Without knowing what exactly is wrong regarding the stability, I cant imagine a full demolition and start over is cheaper than trying to make modifications to the existing structure. I could see it being done out of an abundance of caution, mostly because things went south very badly with the FIU bridge.
Anyway, apologies for the wall of text.
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Anecdotal, but I have one renovation project in San Antonio so far has been put on hold. For my projects that are under construction, most of the contractors are implementing cleaning regimes, spreading out the workers, and then one project of mine split their workforce into 3rds and put them on day shift, evening shift and night shift.
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Yeah, the sign price I actually think sounds about normal for what I would expect fom IAH and HOU Signs. My smirk is more of a, "why spend a million dollars of tax-payer dollars on a sign". I'm being a bit of a debbie downer on this one, sorry.
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Additionally, about $934,000 is needed to create and install a Houston Space monument sign, similar to the ones at the George Bush Intercontinental, William Hobby and Ellington airports, according to the memo.
😕
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13 hours ago, BeerNut said:
Land values are still fairly cheap throughout Houston but with so much office stock is there any reason to think we will start to see office to apartment/condo conversions outside of Downtown?
Few of my projects outside of Houston have been office --->hotel conversions. Havent seen it too much in Houston yet.
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They just play U2's "Where the streets have No Name" on a loop the entire time youre there.
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2 minutes ago, s3mh said:
I was in the apartment market back then. I really wanted to live in Post-Midtown because it was actually like a real city street. The rent for 1 beds was one of the most expensive in the city at almost $1,000. Camden Midtown was more reasonable, but a crumbier complex with ground floor hobos instead of retail. But it was still on the expensive side for back then due to the proximity to downtown.
I don't think that this part of the East side is going to gentrify like Midtown and you could actually make a case that Midtown was dumpier back in the early 2000s. But I think this is a good location for affordable housing. There is gentrification creeping out from Eastwood towards Pecan Park. Once it hits a Heights-esque critical mass, the need for affordable housing will just continue to grow. This city needs as many affordable housing units inside the loop as can be built.
agreed, I rented at Post Midtown in 2009, right after the financial crisis. If I remember correctly the 2 bedrooms (I had a roommate) were running like $1300/mo total at the time. That price point rose precipitously as the years went on.-
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15 hours ago, zaphod said:
If this project succeeds, would it signify that this particular form of multifamily(urban block with structured parking) is now viable on the lower end?
New garden apartments get built occasionally in forgotten areas but the urban style ones tend to be reserved for expensive desirable areas. But if it was possible to build urban apartments in cheaper areas it would be revolutionary. More multifamily could crop up in closer in locations like this.
People forget that when Post-Midtown, Camden Midtown , Ventana at Midtown were built, Midtown was sort of a dump. Rents werent particularily expensive (at least compared to now) back in the early 2000's for those places.
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@Subdude Fixed it. Expert photoshop skillz
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48 minutes ago, Luminare said:
Depends. If its a firm that normally operates out of state then it will mostly be design work and then they will partner up with a local firm. Most firms will just operate with licenses in the state they originate from since its already expensive for individuals to carry one license. Architects with licenses from multiple states are highly competitive in the market with firms. With that being said, the business model for some firms is to stay exclusively in the design realm of projects. A Houston example would be Munoz + Albin which only handles design work before normally passing it off to another. Lake | Flato is another example in Texas which does this. The advantage is that they can divert resources and produce more design work at once without being shackled to one area or one state, and aren't on a single project for too long, but the disadvantages are the costs associated with bringing another firm into the mix and the coordination efforts to make the design a reality. Sometimes this will reduce the quality of design during VE if a design firm isn't knowledgeable in how their designs are actually constructed. This is why typically you really only see a purely Design firm + Architect of Record team up in state when the project has a big enough budget or seeks a design presence which requires the specificity of a design firms focus, and then save the costs for CD's by passing it to an Architect of Record which has the manpower to get the drawings done quickly. In out-of-state examples its to associate a brand name architect and their design expertise for a significant project that will have a great design presence, and then again pass the CD production to one which has the manpower to handle a marquee or iconic project. There is also a third option where this situation occurs, which is actually great for the industry, which is sometimes you get firms that want to get into a certain field of design, or particular clients, but don't have the design clout to get picked up for marquee, iconic, or significant projects. In this situation the becoming an architect of record could be seen as a favor from a more established design firm so the architect of record can get the experience they want, so they can add it to their portfolio.
Away from all that complicated stuff, in most cases firms are all one stop shop from SD to CA. This is the case with the firm that I work at, which I prefer, because I want to know how to carry a design from start to finish. I'm sure their is overlap in the Structure world as well where if its out of state then its dependent on if the firm on the project has a person who is licensed in the state they are doing a particular project in. The downside to this kind of firm is that if they want to branch off into new fields in the industry it can be tough because they prefer to do it all, and if they don't have the portfolio to back it up it can be a wait till you find the right client who will take a chance on you.
EDIT: With that being said, Barkow Liebinger, to my knowledge is not an exclusive design firm, but an all in one firm.
EDIT2: Kirsey is an all in one firm, but typically isn't recognized as a firm with design cloat to do marquee, iconic projects, but has a great manpower and so is a great candidate to be an architect of record. Of course this project isn't something that I would describe as "marquee, or iconic", but my guess is with the name associate with this new building and the fact that it is Rice, they prefer to attach bigger design brand names onto their more visible campus projects and then they give their interiors, maintenance work, and general renovations to people like Kirksey, or PBK, etc... (who are key players in the Education Architecture field).Yeah, Thats about what I would expect. Touching on structural licencing. I'm registered in about 12 states and I agree with you, I dont like a 3rd party engineer signing and sealing my work and prefer to see my projects end to end. Generally if I have an out-of-state project, I make the effort to get licenced in that state. Even then, My boss has something like 42 states so generally we're covered for out of state projects. We've had projects where a "top dog" structural engineering firm designs really high-level engineering drawings for very unique structures, and then we go through and "finish the design" -- I really am not a fan of that as, similar to the architecture world, the "top dog" structural firm doesnt understand the VE implications or worse, "construct-ability" of a structure.
Swinging back to Architecture, Ive been in situations where the "design firm" and Architect of record have butted heads, and its just ugly and difficult to work with at times.
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12 minutes ago, Luminare said:
Well their main office is in Berlin, and they have another in New York, so they would definitely require a local firm. Who are the local folks drafting it?
I dont know how it breaks down in the Architecture world specifically from project to project. Ive seen it where the design firm creates renderings, and may do drafting of interior and exterior elevations at the SD level (Schematic Design/drawings for those unfamiliar with the term). Then DD(Design Development/drawings) and CD (Construction Design/Drawings) is handled by the local firm. But the two will work together to make sure the Schematic design, especially with appearances is met in accordance with the over-arching firm. This happens some in the Structural World but it works a little differently.
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16 hours ago, Luminare said:
Thought this building look very German or what I normally saw out of places like Berlin. Barkow Liebinger is one of most solid arch firms in Germany. Didn't know they ventured this far into the states.
On a few university project I've worked on. I've seen the design architect is an out-of-country firm, but the project architect/production architect is a local firm. Basically, the Architect of record is a local firm, but the design/appearance of the building is determined by the design architect. It would not surprise me if thats the case here.
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I'll volunteer if you need help.
I actually volunteered at my office to create a map of all the projects were engineer of record on and your mapping was a bit of inspiration for me haha. I'm still in the 1970's, kind of fun hunting down these old buildings.
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Heritage Senior Residences At 1120 Moy St.
in Going Up!
Posted
Did a quick peak. Used to be houses on the lot in the 1940s and 50's, then it was mostly warehouses up until about 2016. Been clear for a few years now.
Good infill project. Kind of boring appearance wise, but it works for the area in my opinion.