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the pulley is just changing the direction of the cable. is going to be fixed t0 the floor.

How do I calculate the diameter of a pulley for a given tension in a cable? My force is 20 kips.

Im designing for the first time a water cistern. Its going to be 10 ft underground, ist 20ft by 12 ft and its going to contain 10,000 gals. My question is about the foundation, does the ground slab provides the foundation for the cistern walls or it needs independent footings?

The soil is on the full height. What do you mean by thrust? (Sorry but english is my second language). The existing structure is approx. 100' by 45' 3 story RC structure, and it has shear walls in both directions for seismic and gravity loads (im in a seismic zone). The addition is going to be a...

The structure is an addtion to an existing structure. Its kind of a balcony. At the end of the existing structure there is a frame of rc columns and a beam and 8 ft apart is going to be the retaining wall. The 6 in slab is going to be supported by the frame of columns at one end and the...

I have a retaining wall that Im also using as vertical support for a 8ft - 6in slab. Then, can I assume a pinned top for the wall?

Ok. You are right. I am in a seismic zone. This is a structural slab conventionally reinforced. The length of the old structure is 160 ft by 21 ft. The new addition is going to be 14 ft by the 160 ft of the old structure. I want to make them independent and avoid pounding effects.

I want to design an expansion to an existing building but I want it to make it independent of the existing structure. What kind of joint should I use between the old and new slab?

Thats when you have two footings. I have a series of columns lets say in the x dir and the property line is on the y dir. I dont have a column on the y dir to tie the columns in a combined footing. Thats why I have been advised to tie the columns together in the x dir.

I have to desgin an eccentric footing on the property line of my building. One of the suggestions for the design was to tie the footings together using a grade beam. Where does it tie them together? At the base of each columns? Or tying the foundations together at he base of each foundation?

I have a line of columns on the property line which doesnt allow me to do concentric pad footings. The design wil have to deal with zero length on the side of the property line. I've read about using a combined footing but I dont have another column to do this. I also read about using a...

csd72, Yes. It is done in Puerto Rico where I live.

I have consulted and researched this and found different ways to specify the steel. I have seen one that I can not understand. It has steel in both directions with standards hooks at the end and also the temp reinforcement. It is the same as placing the regular reinforcement with dowels?

Thanks.

Its a roof that slopes in four directions. They are very effective for wind pressures. It like a gabled roof but in two directions.

Im an entry level engineer and have never designed a four sided roof (i think thats the term in english). I was wandering i you knew where to find information in regards on how to specify the reinforcement.

Thanks. I already checked the lateral load resisting system with the addition. Provided addtional structural walls. My question was more oriented to the detailing required for continuity of these members. Specially for columns. You said "overstrength factors" you mean the UBC 1630.3.1...

I have a 2-story RC building. A third story will be added an a 14ft expansion. The third story wil be be designed based on the existing columns and stuctural walls. Making a separate structure for the third story was considered but it was eliminated due to economics reasons. My question here is...