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Architectural Structures 1 & 2
Group 4
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A curvature along theedge of a wood piece,measured at the point ofgreatest deviation, form astraight line from end toend of a piece.
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A warp resulting fromthe turning of theedges of a woodpiece in oppositedirections.
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The presence of bark
or absence of wood
at a corner or along
an edge of a piece.
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An area on the
surface of a board or
panel missed by a
planning machine.
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A surface charringcaused by overheatingof the cutting blades orabrasive belts duringshaping or finishing ofa material.
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The term applied towood after it is sawedor sliced into boards,planks, sticks, etc. forcommercial purposes.
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Lumber that is sawn,
edged and trimmed,
but not sufaced.
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Lumber that issurfaced with aplanning machine toattain a smoothsurface and uniformsize.
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Of or pertaining to adressed lumber havinga moisture contentexceeding 19% at thetime of manufacture.
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Of or pertaining to adressed lumber havinga moisture content of19% or less at thetime of manufacture.
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Of or pertaining tolumber that has beendried to reduce itsmoisture content andimprove itsserviceability.
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The dimension of lumber
before drying andsurfacing, used forconvenience in definingsize and computingquantity. Nominal sizesare always written withoutinch marks. Also callednominal size.
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The dimension of lumberafter seasoning and
surfacing, from 3/8 to inches (9.5 mm to 19.1mm) less than thenominal dimension. Adressed size is alwayswritten with inch marks.Also called DressedDimension.
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S1S- Surfaced on oneside
S2S- Surfaced on twosides
S4S- Surface on foursides
S1E- Surfaced on theedge
S2E- Surfaced on twoedges
S1S1E- Surfaced on oneside and on one edge
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The classification of
lumber on regard tostrength and utility inaccordance with thegrading rules of anapproved lumbergrading.
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Softwood lumberintended for general
building purposes,
including boards,
dimension lumber
and timbers.
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Yard lumber less
than 2 in. (51 mm)-
thick and 2 in . or
more wide.
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Yard number from 2inches to 4 inches
(51 mm to 102 mm)
thick and 2 inches or
more wide
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Dimension lumber 2inches to 4 inches(51mm to102mm)thick and 2inches to 4 incheswide, intended for usewhere high strengthvalues are notrequired.
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Structural lumber ofrectangular cross section,
from 2 inches to 4inches(51mm to 102mm)thick and more than 4inches (102mm) wide,graded primarily withrespect to bending strengthwhen loaded either on thenarrow face as a joist or inthe wide face as a plank.
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