Lumber'Specifica.ons'in'a'Changing'Market''

Transcription

1 Western Wood Products Association Lumber'Specifica.ons'in'a'Changing'Market'' Presented(by(( ( Frank&Stewart& ( ( "Western"Wood"Product"Associa1on"2015 ( " Disclaimer:(This(presenta5on(was(developed(by(a(third(party(and(is(not(( funded(by(woodworks(or(the(so>wood(lumber(board."

2 The"Wood"Products"Council "is" a"registered"provider"with"the" American"Ins1tute"of"Architects" Con1nuing"Educa1on"Systems" (AIA/CES),"Provider"#G516." " & Credit(s)"earned"on"comple1on" of"this"course"will"be"reported"to" AIA"CES"for"AIA"members." Cer1ficates"of"Comple1on"for" both"aia"members"and"nonqaia" members"are"available"upon" request." " " This"course"is"registered"with" AIA"CES"for"con1nuing" professional"educa1on."as" such,"it"does"not"include" content"that"may"be"deemed" or"construed"to"be"an" approval"or"endorsement"by" the"aia"of"any"material"of" construc1on"or"any"method"or" manner"of" handling,"using,"distribu1ng," or"dealing"in"any"material"or" product." Ques1ons"related"to"specific"materials," methods,"and"services"will"be"addressed" at"the"conclusion"of"this"presenta1on." " "

3 Course'Descrip.on' This"presenta1on"will"cover"relevant"industry"standards"and" specifica1on"issues"that"can"arise"with"material"subs1tu1ons." Product"availability"at"both"the"local"and"na1onal"level"and"its" impact"on"design"considera1ons"will"be"discussed"in"depth.""

4 Learning'Objec.ves' 1. Reference resources, tools through WWPA and analyze relevant industry standards. 2. Evaluate and specify solid-sawn wood products. 3. Regional variations in product availability. 4. Using industry standards to write specifications " " that can understood by material suppiers.

5 WWPA'Func.ons' " Quality"Standards/Manufacturing"Services" Technical"Services/Market"Services"

6

7

8 19.3"Billion"Bd./Ft."(2004)"vs."14.63"Billion"Bd./Ft/"(2013)"

9 Average'mill'produc.on'' Sawmills Operating in the West Number of Sawmills 1000 Avg. Production - Million Bd Ft Est."150"Mills" 76"MMBF"/"Mill" Source:'WWPA'

10 Western Region Douglas Fir Hemlock (Hem-Fir) Western Cedars Redwood

11 Western Region Douglas Fir Hemlock (Hem-Fir) Western Cedars Redwood Ponderosa Pine Sugar Pine Spruce Idaho White Pine

12 U.S."Commercial"Forestland"

13 Species'Groups' West" """"""""""""Douglas"FirQLarch" """"""""""""Douglas"Fir"(South)" """"""""""""HemQFir"(White"Fir)" """"""""""""SpruceQPineQFir"(South)" """"""""""""Western"Cedars" """"""""""""White"Woods" " " " South" Southern"Pine" " Northeast" SpruceQPineQFir"(South)" Eastern"White"Pine" Canada" SpruceQPineQFir" Douglas"Fir"(North)" HemQFir"(North)"

14

15

16 I' Interna.onal'Building'Code' 'Sawn'Lumber.'Lumber"used"for"loadQsuppor1ng" purposes,"..."approved"by"an"accredita1on"body"that" complies"with"doc"ps"20"or"equivalent." "

17

18 Na1onal"Grading" Rule"Commicee" American'Lumber'Standard' CommiLee,'Inc.' ALSC"" Board"of"Review" Rules"" wri1ng"agencies" Inspec1on" agencies"

19

20

21 Product'mix'changes' Western Lumber Shipments MMBF Selects and Shop Commons Dimension 5,242 3,039 Studs 2,201 1,720 Timbers Export Total Invoice Volume 9,406 6,562 Percent of Total Shipments Selects and Shop 4.5% 4.7% Commons 10.4% 13.3% Dimension 55.7% 46.3% Studs 23.4% 26.2% Timbers 4.6% 5.2% Export 1.4% 4.2% Source:'WWPA'

22

23 Lumber'Size'Categories' ' " Timbers' 5 x5 "&"larger" Dimension' 2 "to"4 "thick" 2 "wide"&"wider'''' Boards" 1 "thick"&"thicker" 2 "wide"&"wider"

24 Copyright'Materials' This"presenta1on"is"protected"by"US"and" Interna1onal"Copyright"laws."Reproduc1on," distribu1on,"display"and"use"of"the"presenta1on" without"wricen"permission"of"the"speaker"is" prohibited." " "The"Wood"Products"Council"2013"

25

26

27 Copyright'Materials' This"presenta1on"is"protected"by"US"and" Interna1onal"Copyright"laws."Reproduc1on," distribu1on,"display"and"use"of"the"presenta1on" without"wricen"permission"of"the"speaker"is" prohibited." " "The"Wood"Products"Council"2013"

28 Lumber'Grade'Marks' '

29 I' Interna.onal'Building'Code' 'Sawn'Lumber.'Sawn"lumber"used"for"loadQsuppor1ng"purposes," including"endqjointed"or"edgeqglued"lumber,"machine"stressqrated"or" machine"evaluated"lumber,"shall"be"iden1fied"by"the"grade"mark"of"a" lumber"grading"or"inspec1on"agency"that"has"been"approved"by"an" accredita1on"body"that"complies"with"doc"ps"20"or"equivalent." "

30

31

32

33

34

35 Moisture'Content'Standards'

36

37 Dry& Green& Weight'rela.onship'

38 Moisture'Content'Designa.ons'' ' SQGRN" "Greater"than"19%"MC" SQDRY" "19%"or"less" KD" "Kiln"dry"19%"or"less" KD"HT" "Kiln"dry"19%"or"less"and"heat"treated"(56ºC"""" core"temperature""30"min.)" MC"15" "15%"or"less" KD"15" "Kiln"dry"15%"or"less" "

39

40 Green'vs.'Dry'sizes' 1"" 1 2 1" " 1 2 5"" 5 8 Dry& Green&

41

42 Western species shrinkage is approximately 0.2% for every 1% change in MC (Western cedars 0.15%)

43

44

45

46

47 'Shrinkage.'Wood"walls"and"bearing" par11ons"shall"not"support"more"than"two"floors"and" a"roof"unless"an"analysis"sa1sfactory"to"the"building" official"shows"that"shrinkage"of"the"wood"framing" will"not"have"adverse"effects"on"the"structure"or"any" plumbing,"electrical"or"mechanical"systems,"or"other" equipment"installed"therein" " "

48

49 Western Wood Products Association Lumber'Joists'Systems'

50 Calculating Shrinkage' net"width/thickness"x"shrinkage"factor"x"mc"change"="shrinkage" "

51 Calculating Shrinkage ' 2x10 example:" 9.25(inches(x(0.002(x((19( (13(=(6)((=(.11(inches(

52

53

54

55

56 Rough'Carpentry'Specifica.ons'! PS"20"! Sizes"! Species"! Grade"! Moisture"content"at"1me"of"manufacture"! Grade"stamped"! Minimum"working"stresses"! Surface"texture"when"appropriate"! Reference"agency"grading"rules"as"appropriate" "

57 Use'Categories' Structural"Light"Framing" Light"Framing" Studs" Structural"Joists"and"Planks" Timbers"

58 Lumber'Design'Values' ASTM"D"1990" "Dimension"Lumber" ASTM"D"2555" "Timbers" ASTM"D"245"Q"Timbers"

59

60

61

62

63 I"am"working"on"a"renova1on"of"a"wood"building"in"Oahu,"HI"and"part"of"the" work"involved"analyzing"some"exis1ng"trusses."these"trusses"have"a"douglasq fir" STAND"&"BTR "grade"stamp"on"them"(see"acached)."i"was"having" difficulty"loca1ng"the"structural"proper1es"of"this" standard "grade"wood"in" the"nds"code."do"you"know"of"a"document"that"would"provide"this" informa1on? " "

64

65

66

67

68

69

70

71

72 Finish'Carpentry'Specifica.ons'! PS"20"! Sizes"! Species"! Grade"! Moisture"content""! Grade"stamped"(op1onal)"! Profile"or"Industry"Standard"Pacern"! Surface"texture/Grain"when"appropriate"! Reference"agency"grading"rules/paragraph"number" " "

73 NonXStructural'Lumber'

74

75

76 Appearance'Grades' Selects"" Finish" Commons" "Special"Siding/Paneling" ""Special"Western"Red"Cedar"

77

78

79 Uppers '(MC'15%)' "Selects " """""""""""""""""Special"WRC"" """""""""""""Finish" " " " """"""""""""""""""""""Clear"Heart" ""B&Btr" " " " " """"""""""""""""""""""""A" """""C " " " " " """"""""""""""""""""""""""""""""""""""""""""""""Superior" """""D " " " """"""""""""""""""""""""B" """"""""""""""""""""""""""""Prime" " " " " " " " """""""""""""""""""""""""""""""""""""""""E"

80

81 KnoLy '(SXGRN/SXDRY)' ""Common """""""""""""Knocy"Cedar """""""""""""""Alternate" "2&Btr " """"""""""""""""""""""Select"Knocy """""""""""""""""""""""""""""Select"Merch." """"3 "" " " " """""""""""""""""""""Quality"Knocy """""""""""""""""""""""""""""Construc1on" """"4 " " " " """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""Standard" " " " " " " """""""""""""""""""""""""""""""""""""""""""""""""""""U1lity" """"5" " " " " " " """""""""""""""""""""""""""""""""""""""""""""""""""""Economy"

82 Ques.ons?' This"concludes"The"American" Ins1tute"of"Architects"Con1nuing" Educa1on"Systems"Course" Frank'Stewart' Western"Wood"Products"Associa1on"