I have attached a section from Wang and Salmon's Reinforced Concrete Design, 1998 which provided a good reference on the topic. From this, I agree with JAE that
10.5.1 applies to rectangular sections and T-sections having slab in compression
10.5.2 applies to T-sections having slab in tension...
Wow, I thought the first link was rough.
I would like thank everyone for the posts. I agree that 10.5.3 is intended to provide an out for very large sections and 10.5.4 provides the minimum tensile steel for flexural members.
I now have a follow-up question. For background, this is a 8 ft x 8...
Link
All references are to ACI 318-05.
It the above link it is clarified that the minimum flexural reinforcement is not controlled by the provisions of ACI 10.5.1 and 10.5.2 as they do not apply to structural slabs and footings of uniform thickness, rather the minimum flexural reinforcement is...
The foundation has top and bottom reinforcement in both directions.
Based on a shear friction design (ACI 11.7) would the minimum distance between the foundation edge and the failure plane be as shown in the attached drawing? 2 to 4 feet seems like a significant oversizing of the foundation...
The "as a beam" detail was just a comparable example for the "as a foundation" design situation; and I forgot to label the compressive shear failure plan on the "as a foundation" detail, the dashed line top to bottom, left to right. The foundation has been designed as a simple beam for moment...
Situation: A pad/mat foundation is supporting 4 point loads (6" square bearing plates). The foundation thickness has been designed for one way and two way (tension) shear per ACI.
What I was wondering was how to calculate the resistive strength of a compressive type shear failure (see...
Does anyone have any resources on the proper design of crushed stone driveways/roads; including thickness requirements based on tire loads, subsurface conditions, the use of geotextiles (geomembranes and geogrids) as a replacement to additional stone thickness, construction issues, etc. I have...
I am looking for some references/codes/guides that would be available for the design of basement walls as plates with fixed end supports rather than as a retaining wall. While constructing residential basements, I had built walls with a very minimal longitudnal steel. I had gone out to a...
Thanks for all the info. Most of the foundations we use are not much deeper than 16 ft. In talking with the crews contructing the piers, they give the cage a lift into place during the pour, giving the concrete cover at the bottom of the pier.
The ACI code provides for 3 inches of concrete cover when permanently exposed to earth for the construction of a drilled shaft pier. I would think it would be easier to have the rebar cage rest at the bottom of the pier for the purposes of construction. I am unaware of how the rebar cage...