Design Criteria tab of the spreadsheet shows the parameters used in the whole design of the structure. What are these parameters? These are the following:
- Reference Code
- In the Philippines, its NSCP which is the reference code but this is actually referenced from UBC 1997 from the USA. Modifications of UBC to adapt to local conditions is made however.
- Loads
- Dead Loads
- These are the permanent loads in the structure. Values in red are input values. That means these will be referenced by other design sheets of the spreadsheet to guarantee uniformity of values.
- Live Loads
- For residential building, a typical floor has 1.90 kpa of live load.
- Seismic Load
- Engineer will need to refer to NSCP Chapter 2 to determine seismic parameters.
- For seismic parameters, just input the distance of the site from the nearest seismic fault line, importance factor, ductility coefficient and soil profile, then the spreadsheet will come up with proper seismic values.
- Wind Load
- For wind load, you need to choose the zone factor of the site location and corresponding wind velocity also the roughness exposure of the site.
- Materials
- Concrete Strength
- The red input for concrete strength will be linked to other design tabs of the spreadsheet like the slab design, stair and beam design.
- Rebar strength
- Structural Steel strength
- Soil Data
- Soil data will be linked to footing design tab.
- Design Constants
- Since you have inputted material values above, design constants will be automatically computed by the spreadsheet. These are important in design procedures of structural elements. Because you will need to determine the max and minimum reinforcement ratio, from these parameters.
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