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EARTHQUAKE DAMAGED FOUNDATIONS
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FRAMING DAMAGE, INSPECTION, REPAIR
GRADING, DRAINAGE & SITE WORK
HOUSE PARTS, DEFINITIONS
INSECT INFESTATION / DAMAGE
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LOG HOME GUIDE
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MODULAR HOME CONSTRUCTION
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PORCH CONSTRUCTION & SCREENING
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RETAINING WALL DESIGNS, TYPES, DAMAGE
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SINKHOLES, WARNING SIGNS
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STRESS SKIN INSULATED PANELS
STRUCTURAL WOOD ASSESSMENT
TIMBER FRAMING, ROT
TRUSSES, Floor & Roof
WATER ENTRY in BUILDINGS
Fractometer test methods for determining the soundness of wood structural members: with the use of the increment borer one can take a core sample out of a wooden structure with a diameter of 5 mm. This core sample is then used for assessing with the Fractometer Print.
This article series describes the various methods used to test & evaluate the structural integrity of wood-framed buildings where focus is on the condition of structural wood posts, beams and other framing members. We discuss the problems surrounding hidden rot or decay, the presence or absence of moisture or other instrument-detectable clues, and the problem of subjective decisions to replace or not-replace suspect wood structural members.
This article compares using micro-drilling with other methods to screen both standing trees and wood structural elements for hidden damage.
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Paul Probett, Clinton Craig, Blake Probett, Incodo Forensic Building Specialists 
This article series on methods for assessing structural wood rot & damage is adapted & expanded from the author's "An Introduction to Micro-Drilling Technology for N. Z. Structural Timber Assessment" and is used with permission. We [DF] have added comments, some illustrations, and additional article citations. [Click to enlarge any image or illustration]
Properties of fractometer assessment of wood damage
5mm cores required – compression, bending and torsional tests.
Scope = Specific samples only, but comprehensive.
Using a fractometer approach the condition of the wood member is not completed in-situ or on-site.
With the use of the increment borer one can take a core sample out of a wooden structure with a diameter of 5 mm. This core sample is then used for assessing with the Fractometer Print.
A Fractometer Print puts bending load on the core sample that was taken from a wooden structure until it breaks.
The bending break moment and the breaking angle can be determined as can compression strength and other measures.
The Fractometer has been described in IML's instruction manual where bending strength, fiber direction, and related concepts are detailed.
IML is Instrumenta Mechanik Labor System, Wiesloch, Germany. .
Note: Above information is copyright, commercially sensitive and is yet to be peer reviewed. It is not to be copied or circulated without the express and written permission of Incodo Limited. Adapted here by InspectaPedia.com, with permission from Incodo 8/5/2012, technical review is in process.
V4a 06/12 - ####
Continue reading this article at WOOD BEAM PILODYN TESTING or select a topic from the More Reading links shown below.
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