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STRUCTURAL INSPECTIONS & DEFECTS
ARCHITECTURE & BUILDING COMPONENT ID
CHIMNEY INSPECTION DIAGNOSIS REPAIR
COLUMNS & POSTS, DEFECTS
CONNECTORS, FASTENERS, TIES
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
FOOTING & FOUNDATION DRAINS
FOUNDATION CRACKS & DAMAGE GUIDE
FRAMING DAMAGE, INSPECTION, REPAIR
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
WATER ENTRY in BUILDINGS
WOOD STRUCTURE ASSESSMENT
This article describes and illustrates the different types of roof and floor trusses used in residential construction. We describe common roof or floor truss defects that can be observed by visual inspection. This article series describes building framing materials used in different epochs of residential construction. Knowing when certain materials were first or last in common use can help determine the age of a building. Our page top photo shows modern floor framing details for a modular-constructed house.
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Wood Floor & Roof Truss Photos
Our photos show an attic view of modern roof trusses (above left) and floor trusses (above right).
Illustration of Howe Trusses & Fink Trusses
The illustrations below illustrate two common wood roof truss designs: the Fink Truss and the Howe Truss.
Common defects observed when inspecting wood roof trusses in residential buildings
Metal Floor & Roof Truss Photos
Our photos below illustrate the use of steel roof trusses below a flat poured concrete roof. At below right you can see that steel roof trusses are not completely immune to damage from water, leaks, and rust. We don't consider surface rust to be of structural significance on these trusses, but when the rust has advanced to flaking exfloiating steel rust then the integrity of the truss and thus the structure is questionable.
Below our photograph illustrates a steel I-joist also used in roof and floor construction. Also see I-JOISTS, Wood Roof Floor.
See Framing Methods Age for the history and date ranges of various building framing methods. Also see NAILS & HARDWARE, AGE and SAW CUTS, TOOL MARKS, AGE for additional building age clues likely to be available when examining building framing materials. Also see ARCHITECTURE & BUILDING COMPONENT ID.
Also see I-JOISTS, Wood Roof Floor.
Frequently Asked Questions (FAQs) about roof or floor trusses used in building construction
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