Live Crown Removal Limit (Pruning Dose)
The ANSI A300 Part 1 live-crown removal check.
Example
You enter
- Live crown / foliage before pruning (ft² or %) 100
- Foliage proposed for removal (same units) 15
- Maturity class mature
You get
- Removal percent 15%
- Cap (%) 25
Checked against published worked examples from: ANSI A300 Part 1 / ISA BMP - Pruning.
Details, formula, and sources
Scoperemoval_pct = removed / live x 100 against the maturity-class cap (mature <= 25% in a season, young ~15%, over-mature ~10%, stressed 0%). The 25% is the mature-tree MAXIMUM, not a target -- a young or stressed tree gets far less. Lion's-tailing violates A300 even under the percent cap.
Formula or tableremoval_pct = removed_foliage / live_foliage x 100; cap_pct = mature 25 / young 15 / over-mature 10 / stressed 0; within when removal_pct <= cap_pct.
Source and editionANSI A300 Part 1 5.5.3 (not more than 25% of the foliage in an annual growing season, adjusted for species, age, health and site) and ISA Best Management Practices - Pruning, by name.
Free accessThe A300 removal-limit percentages are published arboricultural practice; a qualified arborist governs the actual dose.
What governsEstimate. AHJ and licensed professional govern.
API field nameslive_foliage, removed_foliage, maturity_class, removal_pct, cap_pct
- Class caps mature <= 25% single season (A300); young 15%, over-mature 10%, stressed 0% are conservative planning adjustmentsANSI A300 Part 1 5.5.3 / project adjustment
- Lion's-tailing stripping interior foliage violates A300 even under the percent capISA BMP - Pruning