I've been working 1 day a week from home for the last 2 1/2 years while working for national A/E firms in the building design sectors. There's always been some pushback from others in the office, likely the old-school mentality/fear that people won't work if their supervisor can't walk by and...
I've had contractors throw all kinds of justification at me to allow wet-setting, including a letter from another "engineer" that quote "wet-setting is industry standard". I believe there is an explicit statement that all items to be embedded in concrete have to be secured in place prior to...
I've run into this issue on multiple projects where it caused significant project delays and conflict within the project team. In my opinion, the best solution that I have seen is an additive to the concrete mix that effectively closes the interstitial pores that Ron mentioned during the curing...
I agree w/ KootK, but I would also typically defer to your precast manufacturer for the actual design of the attachment. I typically provide guidance on the type of connection that is acceptable if there are aesthetic restrictions from the architect or other considerations (structural...
No, typical joist bridging is not suitable for suspending MEP equipment. Any suspended loads should be supported directly from the steel joists at panel points or from additional framing specifically designed to support vertical loads. Bridging is typically only sized to provide lateral...
My understanding is that the "bare bones" package is the same features that were previously available for the desktop product. The "bells and whistles" are the new features that are being added in this new release (they haven't been available before). That's how I read the feature comparison for...
Does Hilti allow the HDA-T for use with dynamic loading? I would be hesitant to use expansion-type anchors in this situation because of the adjacent holes as well as the issues of dynamic loading, vibration, etc. The anchor only works by exerting outward pressure on your hole. In my mind, the...
It's my understanding that the seismic criteria for diaphragms does not apply when you are considering wind loads. I don't know the exact section, but the ASCE 7-10 commentary discusses this somewhere. I think it even goes so far as to say what types of roof deck/diaphragm can be assumed...
I would proceed with great caution. There are multiple issues with using something like this for long-term support. I know contractors use them for temporary shoring, but, personally, I won't use them for a permanent lintel. You're relying on a handful of bolts to support CMU of unknown quality...
Alan CA, it might be helpful for you to take a look at ACI 306 which gives criteria and recommendations for cold weather concreting. I don't have it open in front of me, but I'm fairly certain that it will give you an approximate time frame for protecting concrete from cold temperatures. As...
Typically, as an EOR, I have a note that indicates the contractor is responsible for all temporary bracing until the building is complete (including diaphragms, shear walls, etc.). Often your liability insurance doesn't cover construction bracing or shoring. If your precast erector is...
If you're in a cold climate, I would suggest having a frank discussion with your architect about potential issues with thermal bridging. As well as noting that the mastic coating will need to be maintained often relative to the life of the building.
My current company does a decent amount of design for repetitive buildings and installations around the country. Most of them, we have a calculation template, but we create a new calculation package and drawing set for each installation or project. For others, what we've done is take a...
