Description
Return nominal coping width with two overhangs.
Building quantity takeoffs depend on inclusion/exclusion rules, repeated modules, joint placement and material thickness. Net area and ideal layer resistance are limited model quantities; actual fit, heat/moisture behavior and construction performance require the full assembly and measured material properties.
Return nominal coping width with two overhangs.
When to use this tool
Use Parapet Coping Drip Edge Extension when checking the stated material, layer, module or takeoff convention.
How to use the tool and how it works
- Enter wallWidth, firstOverhang, secondOverhang. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read copingWidth. Use the output convention below.
Return nominal coping width with two overhangs. Require nonnegative wall and overhang widths; copingWidth is their sum.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| wallWidth | Wall Width | Required. Finite number; minimum 0. |
| firstOverhang | First Overhang | Required. Finite number; minimum 0. |
| secondOverhang | Second Overhang | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| copingWidth | Coping Width | Required. Finite number. |
{
"input": {
"wallWidth": 0.3,
"firstOverhang": 0.05,
"secondOverhang": 0.05
},
"output": {
"copingWidth": 0.39999999999999997
}
}Limitations and assumptions
- This does not select an appropriate drip detail, material, fixing or safe parapet design.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use complete drawings, specifications and suitable assembly/material analysis for actual procurement, hygrothermal performance or construction.
References
Similar or alternative tools
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