California Building Code section 1803.3 requires 5% min slope away from the building foundation or 2% min for impervious surfaces. I have some guesses, but does anyone know for certain the rationalization behind this? Can this required minimum not be met (say 1% for concrete paving) and still...
Thanks Ron, do you have a source for this value? As I recall, manufacturers would utilize FS in that range on the BOND in the tables that we all used to use but I would think that with field-testing one would have to proceed carefully before using that sort of FS to be sure that the capacity of...
Are there any IBC requirements to test post-installed epoxy anchors in concrete? The anchors were design per ACI 318 App D. If not, any ideas on what to specify for a testing procedure and a test load? I would assume the test load would be based on the required and/or design capacity?
Thanks in...
I am working on a small residential project that will require re-working a bit of the driveway. Existing driveway is ac paved with a slope of about 19% and I'm concerned about vehicle grip. What is the best way to ensure good roughness on new AC? Is there any data supporting roughness anything...
I recieved a response from ACI this morning and I must say I am rather dissapointed. I feel the response is fairly "canned", without specific thought given to the subject. The question I posed it pretty much verbatim what I posted on this forum. Here's the response:
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ACI publishes codes...
Thank you all for your responses. ACI 360R table 13.1 provides a great overview of various items that adversely effect shrinkage. Addressing as many of these items as possible with the mix and set up is certainly an important first step.
With the project at hand, an additive was utilized that...
I am hoping someone may be able to clarify why ACI 360R-06, section 5.4 suggests that semi rigid epoxy provides sufficient shoulder support for joints subjected to wheeled traffic and discourages the use of elastomeric joint filler? Any knowledge gained from practical experience would also be...
There are companies that are set up for this. My father has a partner that I seem to recall regularly reclaims 90 - 95% of old brick from buildings that are being demolished.
Agreed, but the shear develops on the horizontal plane and much like the picture you provided the primary member is much wider than the tenon. So the question is, can you develop shear failure in the relatively short tenon without gaining some benefit from the primary member. I can visualize...
I am checking the capacity of an existing timber bent frame with mortise and tenon connections. I would think you would get some contribution from the primary member (just away from the reduced section at the tenon) to resist the shear...thoughts/input would be appreciated. I have one tenon...
Thank you all for your replies, but I think I've lead you astray. I know the drilling company and their methods for drilling the hole, so I'm o.k. there. My question is, for a commercial project utilizing the shaft for ventilation and utility (from surface) access, how should I detail the final...
I'm hoping someone can help with a suggested resource for a small diameter (12"-36" diameter) vertical shaft design. Maximum depth of the shaft is about 30'. Shafts are for utility and air supply for and undergound tunnel in rock and are to be installed by drilling a hole, dropping in the liner...
Yes, that's a great resource for steel, but I have to admit I'm a bit rusty determining the effective stresses in concrete, where calculation of phiMn is no problem. Also, it seems to me that these equations may tend to be unconservative if applied directly since reinforced concrete is not a...
Does anyone have a good reference for equations for calculating induced moments in a circular slab (simply supported) with uniform pressure?
Thanks in advance.
Much more expensive than vegetation, but it's a surface that's been stripped down to rock, making it challenging to establish growth. The rock is somewhat erodable with a 50% grade down to the house (at the toe of the slope), hence the concern. The project geotech has indicated the slope is...
Has anyone used chainlink fence as reinforcement for shotcrete slope paving? I have a client who wants to use the chainlink as an alternative to WWF for slope paving for permanent erosion control. The ground surface is fairly irregular making the chainlink much easier to install. The chainlink...
The example I provided seems to indicate that using the Ultimate values input and designing for a FS of 1.5 also yields a FS for pullout of 2.0 (confirmed by the FS yielded by the pre-factored results)...both criteria are met. I would request that other members verify this since I cannot point...
I had the very same question regarding the bond strength values input into SNAILZ and resolved it as follows:
under the Reinforcement Strength/Cond. tab,
1. When using Ultimate input parameters the bond strength is input as an ultimate value (and BSF is kept at 1.0).
2. When using...
Excellent suggestions. I did a quick search on California's website and came across this resource:
http://www.dot.ca.gov/hq/tsip/hseb/crs_maps/
Thank you all for the feedback.
TDAA, that's what I currently do as well. I find that by the time I fiddle around with mapquest scale/detail, import the file, trace over it, and add text that I've got a couple hours invested. Call me lazy if you like, but I feel like there should be more of a copy paste solution.
civilperson...
