Green log weight estimates are useful for planning, but they are not measured load weights, rigging designs, crane load-chart calculations, loader stability checks, or legal trucking weights. A log section can vary materially from any table value because of exact species, moisture, season, bark, taper, limbs, hollows, decay, soil, and defects.
The ToolGrit app uses local species-density rows and simple geometry to produce a preliminary weight estimate. The source pointers include USDA Forest Products Laboratory wood-property context plus ANSI, OSHA, and ASME safety context, but the local rows and WLL estimate remain source gaps. Use calibrated measurement and qualified arborist, rigger, crane, loader, transport, or safety review before relying on a value.
Green Wood Density by Species
Green wood density varies by species, site, season, moisture, stem position, bark, and condition. USDA Forest Products Laboratory material is a useful source pointer for wood-property context, but local app rows should not be treated as verified table values until every species, grouping, and moisture basis is reconciled against permitted source material.
Actual density varies with position in the tree. Butt sections, crotches, reaction wood, branch attachments, hollows, and decay can move the actual weight away from a simple species average. A standing dead tree may be lighter because it has lost moisture, or heavier in localized areas because of water, soil, bark, or reaction wood.
The practical rule is to treat species rows as a starting estimate, then verify with a scale, load cell, dynamometer, source table, or qualified field review when the value affects lifting, lowering, loading, hauling, sale, or settlement decisions.
Green Log Weight Estimator
Estimate green wood weight by species, diameter, and length with crane/loader WLL capacity check.
Log Volume Estimation Methods
The app uses simple cylinder arithmetic: volume equals pi times radius squared times length, with diameter entered in inches and length in feet. The weight screen multiplies that volume by the selected local density row or a custom user density, then applies bark and irregular-shape allowances.
Most logs taper from butt to top. The current app uses local taper screens based on measurement point: butt-end measurement reduces the cylinder volume, midpoint uses the entered cylinder, and small-end measurement increases it. This is not a full log-scaling method, a taper equation, or an irregular-form measurement standard.
For crotches, root flares, limbs, hollows, sweep, and decay, use measured weight or a more detailed field method. The app shape allowance is only a planning multiplier and cannot prove the actual load.
Rigging and Equipment Implications
A preliminary weight estimate can help decide what needs further review, but it does not determine the rigging or equipment specification. Crane and loader work still requires manufacturer load charts, radius and setup checks, ground support review, operator qualification, signaling, inspection, and site controls. Rope rigging still requires dynamic-load evaluation, rigging-point assessment, sling and hardware tag data, hitch and angle review, and employer procedures.
The app WLL screen only multiplies estimated weight by a user-selected uncertainty margin and compares it to an entered WLL. It does not evaluate sling angles, hitch types, rigging hardware, shock loading, center of gravity, side loading, boom radius, outriggers, wind, overhead hazards, exclusion zones, or inspection/removal criteria.
For ground handling and transport, use measured weights, equipment manuals, payload ratings, legal limits, securement rules, scale tickets, and qualified review. The app is a planning estimate, not a legal or safety approval.