CE 473
Fall 2014
Design Studio, Meeting #2
Framing and Load Estimation
Names________________________________________________
Grade ____/____
You are being provided a set of drawings for an office, 30-story RC building. The building is being built in
San Francisco, CA using reinforced and prestressed concrete. For the purposes of this studio, we shall
assume the building is to be built in Chicago using reinforced concrete only.
Throughout the semester you will use these drawings and the material covered in lectures to select
dimensions, reinforcement, required material properties, and detailing, for columns, beams, slabs. The
final selections must be reported through and complete and clear set of drawings drawn to scale. Clear
calculations supporting your choices also need to be reported. The objective is to use this example to
learn the main steps involved in the structural design of a regular RC building structure excluding its
foundation and lateral-load resisting system (the core wall).
1) Select floor framing, concrete strength, reinforcement grade, and dimensions for beam, column, and
slab cross sections. Do not assume that the column dimensions and span lengths shown in the drawings
are adequate.
Note: you will be judged on the basis the economy, safety, and “beauty” of your design.
2) Compute:
-factored and service (unfactored) loads for all beams and slabs in a typical floor. Assume all loads to be
uniformly distributed.
-factored loads for all first-story columns
3) Select reinforcement for first-story columns
Notes:
-Use tables to report and organize your results
-Normalize axial loads with respect to the product f’c x Ag
-Turn in only one set of typical calculations. Keep all other calculations to refer to them throughout the
semester. You may be asked to submit them in case a design check “raises a flag.”
-Use a factor of 1.2 for dead loads and 1.6 for live loads. You may ignore other loads.
- You may move columns line up to 3ft from where they are in drawings
- It is up to you to decide where to place beams
- You may add up to 12 interior columns if needed
- If you add columns in the interior they need to line up from foundation to roof
- Clear story height is to remain as indicated in architectural drawings
- Assume all segments of the core wall are 20” thick