I started a detailed Thread (255-155816) concerning this subject on the Geotechincal Forum. In short, I am trying to outline the design rationale for a moderate hieght rockery wall which starts/end at a maximum height of about 9-feet and tapers down to one rock course in about 45 feet.
There is...
ROCKERY WALL DESIGN
Objective: Local Public Works Department (PWD) has asked for design documentation for a proposed ROCKERY WALL as part of the single family dwelling (SFD) project. The wall is not part of the residential structure. The plans and structural package for the SFD were...
The letters represent Modules and N-S walls; all *A walls are against the hillside. Thus, Wall AB, is south of Wall AA and Wall AC is south of Wall AB. I did not give you the x,y cooridnates, just the heights. Here is a cave(BEAR) drawing:).
:-AA-:-BA-:-CA-:-DA-:---EA---:
1 2 3 4...
tincan, thanks for the interest. Here is more information. There are 5 cells, cells share a common wall. I will be comparing costs for cast-in-place and prestressed rein. concr. roof systems. The cell width is 16-feet, interior space. My goal is to design with rein. cmu under the UBC-97...
To tincan,
You can think of it as a counterfort only there is no retaining wall but there is a bearing/shear wall normal to the seismic force. The open side of the box has no lateral resisting elements other than the wall normal (as a retaining is) to the seismic force. In-plane with what...
I am using the method of relative rigities to distribute horizontal forces due to a rigid roof diaphram for a single story structure. The structure is comprised of rectangular boxes all of which are open on one end and closed on the other (earth covered-into hillside). I am looking at placing...
Thanks for all the good information from EPR,DENOID, JHEIDT2543, and LUTFI. All of you are helping me wade through these issues.
Due to the need to preserve a large (2.5' Dia.) blue oak tree, we have reconfigured our footprint. The result is clear spans of 16 feet.
If you had to construct...
Thanks Jheidt2543, I have already contacted Spancrete manufacturers and Fabcon. I will also follow up on Flexicore--I don't remember seeing them as a memember on the Calif. Precast list. Are you aware of anyone providing arched precast units other than Conspan?
I am in search of the best roof system to use in conjuction with reinforced CMU bearing walls for spans up to 20 feet for the purpose of carrying earthen dead loads ranging from 140 to 340 #/sq.ft (1 to 3 feet of soil plus other materials), live loads from 60 to 100 #/sq.ft, and a possible...
jhosborn,
Most of your questions are answered in a book by John Hait, "Passive Annual Heat Storage (PAHS). Think heat flow when comparing the two. You can not just replace one with the other and get the same response (heat/storage/flow). Hope this helps.
I don't visit this site often but here is my contribution.
Thermal Mass is different than heat transfer resistance. R-Value is heat transfer resistance only. Typical R-value for earth is 0.25 per inch; however, the thermal character of the soil mass is quite different than that of material...
