I hope this is the correct forum for this question.
I have a client who is getting some resistance from their local building official regarding the use of Durisol's ICF blocks for a below grade foundation. The primary difference with this system is that their 'blocks' are made from rock wool &...
Trying to upload a photo.
Ralph
Structures Consulting
Northeast USAhttps://files.engineering.com/getfile.aspx?folder=00a021ce-736b-442c-b739-49b7a3abae79&file=DSC_4883.JPG
I am evaluating an existing 3-story hotel for structural modifications. The existing floors consist of a 3.5-4.0" slab on corrugated decking (5/8") supported by what appear to be steels joists. The joists are very similar to metal studs with oval openings in the webs. The profile is a "C"...
@cranky108:
Heath-Zenith is still marketed under that name BUT they are made in China. Not impressed with the quality - too many plastic components that won't survive very well when exposed to UV light.
I've given up on the DualBright technology - nice concept I suppose, but not compatible...
@3DDave:
Yeah, I get that. After switching to an incandescent bulb tonight, I've concluded that the fixture itself is messed up. When set in the Test mode the motion sensor works (DualBright turned off). However, when leaving DualBright off and switching from Test mode to Timer (triggered on by...
Of course he/she would.
I would NEVER utilize wood as a major support of a concrete lintel in a concrete wall opening.
Rot happens - maintenance not so much.
Ralph
Structures Consulting
Northeast USA
@BrianPetersen
The LED bulb IS described as dimmable.
I could live with the motion sensor control only and turn off the dual brightness, however this is how I initially set it up. resulting in the issue as I described - turns on once because of motion, stays on the programmed time, shuts off...
IMHO, draw it as the framer will see it as it's built.
I would consider it as a horizontal section, looking down, cut just a fraction below the floor sheathing.
Ralph
Structures Consulting
Northeast USA
This may not be the correct forum but I had to start somewhere.
I have a Heath-Zenith motion sensor fixture M/N SL-5318-BZ-E (purchased in 2012). In addition to the motion sensor it also has a dual-brightness (DB) feature whereby the lights turn on at half-brightness at dusk. Using a 19.5W LED...
AP - Since it's not against soil and ground water, the best method will depend on the forming system used.
Residential form ties do not (generally) have adequate break-back to fend off the eventual rust & corrosion.
Ties for commercial systems (e.g. SteelPly or Moduforms) can be equipped with 1"...
Like any other design problem - You evaluate the loads, determine what, if any, capacity exists in the remaining core concrete, then devise the means by which loads can be temporarily transferred around the affected column. This is what engineers do.
Ralph
Structures Consulting
Northeast USA
From my perspective all I'm trying to establish is that the drawing, as submitted when it left my OutBox, was as I intended it.
Yes, someone can do amazing things with a snipping tool, PhotoShop, etc. to modify the content of the drawing once they have it, including lifting my seal for use...
You stated "mesh vinyl banner" - what is its porosity? Does it behave as a solid surface or does some wind go through the material? A 40' wide X 120' H banner, even when printed, would be expected to have porosity greater than expected. Even printing on a mesh with 1" square openings is going...
I submit PDF files - LOCKED.
I've only had one entity complain. I took a firm stand - if you want it signed & sealed it'll be locked. If you want it unlocked, there will be no seal & signature. The issue died after that response.
Ralph
Structures Consulting
Northeast USA
Neoprene or PVC washers on a threaded rod are not effective waterstops.
After examining some 400 residential foundations over the last 4 years, my conclusion from my observations is that water will almost always find its way through the interface between the concrete and whatever form tie...
The column shown is obviously not as-cast and has some sort of stucco-like coating. What is the coating? If it is a brittle cementitious or acrylic material the crack may just be in the coating material. Best you try to confirm that the crack is indeed in the underlying concrete.
Ralph...
Agree with DETstru and the attachment.
In my words:
From my perspective in New England, assuming N-S direction parallel to the numbered grids, with North being towards the higher lettered grids:
Consider the greater of:
1. leeward drifting from wind out of the North, accumulating along line H...
When resolving the horizontal thrust at the column-to-footing connection, I would offer these comments:
- Check with the PEMB designer regarding how much horizontal deflection (movement) would invalidate the design of the building frame.
- 100 feet of slab is going to have control joints...
Dayton may be able to provide the certs for the rod used to manufacture coil rod.
Might be worth asking them.
Ralph
Structures Consulting
Northeast USA
