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STRUCTURAL INSPECTIONS & DEFECTS
ARCHITECTURE & BUILDING COMPONENT ID
BEAMS, CRACKS CHECKS SPLITTING
BRICK FOUNDATIONS & WALLS
BUILDING DAMAGE ASSESSMENT & REPAIR
CHIMNEY INSPECTION DIAGNOSIS REPAIR
COLUMNS & POSTS, DEFECTS
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CONCRETE FOUNDATION, WALL, SLAB DEFECTS
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DECK & PORCH CONSTRUCTION
DEFINITIONS of MOBILE HOME, DOUBLEWIDE
MODULAR, PANELIZED CONSTRUCTION
DEFINITIONS of ENGINEERED WOOD OSB LVL etc
DISASTER BUILDING INSPECTION & REPAIR
EARTHQUAKE DAMAGED FOUNDATIONS
FIRE DAMAGE vs MOLD DAMAGE
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FLOOR FRAMING & SUBFLOOR
FOOTING & FOUNDATION DRAINS
FOUNDATION CRACKS & DAMAGE GUIDE
FOUNDATION REPAIR METHODS
FRAMING CONNECTORS & JOIST HANGERS
FRAMING DAMAGE, INSPECTION, REPAIR
FRAMING FASTENERS, NAILS, SCREWS, & HIDDEN
FRAMING MATERIALS, Age, Types
FRAMING SIZE & Spacing, Age, Types
FRAMING TABLES, SPANS for DECKS
GRADING, DRAINAGE & SITE WORK
HOUSE PARTS, DEFINITIONS
INSECT INFESTATION / DAMAGE
KIT HOMES, Aladdin, Sears, Wards, Others
LOG HOME GUIDE
MOBILE HOMES, DOUBLEWIDES, TRAILERS
MODULAR HOME CONSTRUCTION
MOISTURE CONTROL in BUILDINGS
PORCH CONSTRUCTION & SCREENING
PRE-CUT & KIT HOMES
RETAINING WALL DESIGNS, TYPES, DAMAGE
ROT, FUNGUS, INSECT DAMAGE
SINKHOLES, WARNING SIGNS
STAIRS, RAILINGS, LANDINGS, RAMPS
STRAW BALE CONSTRUCTION
STRESS SKIN INSULATED PANELS
STRUCTURAL WOOD ASSESSMENT
TIMBER FRAMING, ROT
TRUSSES, FLOOR & ROOF
WALL CONSTRUCTION BARRIER vs CAVITY
WATER ENTRY in BUILDINGS
Micro-drillng test methods for determining the soundness of wood structural members:
Probett et als., propose a technique to provide objective pass-fail data on the condition of in-situ but suspect structural wood using micro drilling to examine wood density. This service uses timber resistance drill technology to profile variations in timber density associated with timber decay. The work is done on site and the results are instant. This technology is objective and evidential in nature and provides assessment as to whether wood is significantly decayed, suspect or suitable for retention.
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.
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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.
At the references section we include a link to the original article as well as contact information for the authors and Incodo Ltd., a Tauranga, New Zealand forensic engineering firm.
[Click to enlarge any image or illustration]
Our discussion of micro-drilling is divided into three segments. Below is segment 1.
Properties of Micro-Drilling for Wood Structural Member Assessment
Image of micro-drilling, USDA FPL .
Micro-drilling measures drill resistance which is related to timber density and strength.
Visual /brashness testing supported with limited microbiological testing focuses on removal of all decayed timber as the critical element in decisions.
It is suggested that – as decayed frame replacement work is work undertaken under a building consent – testing or assessment should be based on compliance documents as far as possible.
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 - ####
The original authors' article without the expanded discussion added here can be seen at An Introduction to Micro-Drilling Technology for N. Z. Structural Timber Assessment. [PDF]
Additional comments, illustrations, and technical citations addressing wood structure testing technologies have been added. We and the original authors invite and will reply to reader questions and comments using the comments box found at the end of this article. Initial technical review completed 8/6/201
Continue reading at WOOD BEAM MICRO-DRILLING PROCEDURES or select a topic from the More Reading links shown below.
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