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Home My WebLink About05080201 Correspondence 06/16/2006 14:07 FAX 1317738;;4.::1 DAVIDSON 1I"fi .; " ~002l002 ~I ~ ..- DAVIDSON lUMfiER, CO. 2801 NORTH MORTON STREET' FRANKU:i.IN 46131 Phone: (317) 738.3211 . Toll Free: (8001 787.3211 . Fa., (3171 738.3440 02120103 O~D7f02-0 \ To whom it may concern, Fillers are framing added to a truss to complete the desired shape. Fillers are not part of the structural analysis of the truss and are structural only for the purpose of supporting the building materials and transferring their weight to the truss. In residential construction on the bottom of the truss, where fillers usually occur, this would be the weight of the drywall, insulation, wiring, lighting fixtures, HV AC ductwork, and other such materials. Fillers can be factory or field applied. Since fillers are not part of the structural analysis of the truss, they are applied using a set of "rule of thumb" rules that are known to create acceptable results. Factory applied fillers are indicated on the truss drawings by the fact that they do not appear in the table of member forces and there are no joints called out at their ends. Fillers may be removed or field altered using standard stick framing practices, The one exception to this is if the filler is being used for bearing. Any part of the filler filling a gap between a bearing and the truss cannot be altered or removed. Factory built but loose fillers to be field applied are also used. These "Hockey Stick" fillers are usually two piece 'L' shaped fillers used to create smaller filler areas. These loose fillers are to be nailed to the side of the truss and like other fillers should be regarded as stick framing - subject to'all standard stick framing practices. Field applied fillers should be installed in such a way that they transfer the weight of the load to the truss evenly. 'On bottom chord fillers verticals 48" ole are often used. The farther apart the verticals are the more load each one carries and the less even the load becomes. This can cause excessive bending in the member the vertical is attached to. Having a vertical at or near each joint where it will not cause bending in the member it is attached to is a way of avoiding this problem. This is the way we are currently applying our factory-applied fillers. Bracing will be required on the truss bottom chords in filler areas where there is no sheathing (drywall) directly applied to the truss bottom chord. See the truss drawing for bracing spacing in filler areas. If the unsheathed part of the bottom chord is shorter than the required bracing spacing for the bollom chord no bracing is required. For more information see the standard filler detail sheet that is part of the individual job paperwork package. If you have any questions please feel free to call me. I can be reached at (317) 738-3211. ~\\\\U""""""l ~'~\.. He/", 1~ ~ ~ "~~ ;::: .9. \~ :::.., iO'! =' co NO. :: ;;; 0 61)9\04\9 E ~.., Sf~~ oflJ~ ~ ~ ~:\... ~ i:i ,~ ,~l$ ~,"lIf11,,"I\\\\~ " Sincerely. / 5Y'/~ . Joseph L. Heinsman, P.E. "- Technical Services Manager 06/22/2006 13:29 FAX 13177383440 DAVIV~UN !NII l@JUUl ~ JIll. DAVIDSON LUMBER, CO. 2801 NORTH MORTON STREET . FAANICUN. IN 46131 p"""", 13111738.3211 . Toll f.....; (8001 787.3211 . F..: U1n 738.3440 ( 02111)103 To whom it may concern,' Fillers are framing added to a lruSS to complere lhe desired shape. Fillers am not part of lhe structural analysis of the lruSS and are structural only for lhe purpose of supporting the building marerials and transferring !heir weight to lhe trusS. In residential consb'lJCtion on the bonom of the llUSS, where fillers usually occur, this would be the weight of the drywall, insulation. wiring, lighting fixtures, HV AC ductwork, and other such materials. fillers can be factory or field applied. " Since filleIs are not part of the structural analysis of the trusS, they are applied using a set of "rule of thumb" rules !hat are known to create acceptable results. Factory applied fillers are indi~ onlhe trUSS drawings by the fact that thcy do not appear in the table of member forces and there are no joints called out at lhcir ends. Fillers may be removed or field altered using standard stick framing practices. The one exception to this is if the filler is being used for bearing. Any part of lhe filler filling a gap betwcen a bearing and the lruSS cannot be altered or removed. Factory built but loose fil1ClS to be field applied are also used. These "Hockey Stick" fillers ~'usua1ly two piece 'L' shaped filIers used to create smaller filler areas" These loose fillers are"to be nailed to the side of the lruSS and like other fillers should be regarded as slick framing subject to all standard stick framing p~tices. Field applied fillers should be instal1ed in such a way that they transfer the weight of lhe load to the truss cvenly. On bottom chord filIers verticals 48" oIc are often used. The farlher apart the verticals arc lhe more load each one carries and the less even the load becomes. This can cause ellceS5ive bending in the member the vertical is attached to. Having II vertical lit or ncar each joint where it wi II nOl esusc bending in the member it is attached to is a way of avoiding this problem. This is the way wc are currently applying our factory.applied fillers. Bracing will be required on the truss bottom chords in tiller areas where there is no sheathing (drywall) directIy applied to the truss bottom chord. See the truss drawing for braciog spacing in filler areas. If thc unsheathed part of lhe bottom chord is shorter lhan the required bracing spaciog for the bottom chord no bracing is required. For more information see the standard filler detail sheet that is (lart of the individual job paperwork package. If you have any questions please feel free to call mc. I can be reached al (317)738-3211. ~\\\\\IIUIII''''/JI' # \.- Hei/). "W~ ~g~ \, l~ tIO- ~~ ii 0 GO!I'Qo\l9 :: \.., st"~~ ~ ~~~ '~'IIU.",\\~ ;;;/ Joseph L. HeinSlI1iln, P.E. Technical Services Manager 06/22/2006 13:29 FAX 13177383440 ~c:J ITJD . S~E TRUSS QRAWINGS FOR SPE~IFIC BRACING ~ETAILS Technical Services - * BOTTOM CHORDS WITHOUT SHT'G DIRECTLY APPUED (FILLER AREAS), * ARE TO HAVE BRACING PER THE REQUIREMENTS OF THE "LATERAL BRACING" SECTION OF THAT SPECIFIC ENGINEERED TRUSS DRAWING. DAVIDSON IND 1<<1002 FABRICATED AND TO SCISSORS, MONOS, FIELD APPLIED FILLERS AND VAULT TRUSSES Trfm f'R1er ,..-... ATTACH 01 LOOSE SHIPPED fill "AS ITH 3-160 NAILS . BC . TRlhl END(S Trim "liar As Nee~ 01 LOOSE SH\pPEO FIL\...ERS hlAY BE USED FOR 10 psr Be LOADING TRUSSES hlAXlhlUIot 24. o.e. ~\ I- fUll 0 ~ -...0-0 I'a fe-o-o K-WEB VAULT W/SC EXT. SCISSOR TRUSS W/ATTACHED BC FILLER g, ATTACl::lEQ .~C FI\".L~ , , . '------- - "';;;N-ST;~~UR~- ;I~:;; PORTION Of TRUSS MAY BE fiELD TRI_n []R EXTEI<IlEn NON-STRUCTUI:~ MEMBERS DO NOT I APPEAR IN 8ER FORCES TABLE ON ENGINEERED TRUSS DRAWING I __.__.__.__.____.__ _.____ __._...J ~STIWCTURAL f1LLEA PORHCN llf" TRUSS ~'Y BE FIELD TR IMMEll lJIl Elrm'DED rtt:LD APPLIED n.w-~ USING DIMENSIONAL LUMBER WAy 'IE USED Fall i'ii PSF BC LOADING TRUSSES hlAXlhlUhl 24. o.c. * 2x4 Verlleals Locoted 3-'60 Nal Typical 2x_ Material I MAXIM ~I e 10' o.c. as Required for Ceiling Jol sts * BOTTOM CHORDS WITHOUT SHT'G DIRECTLY APPLIED (FILLER AREAS), * ARE TO HAVE BRACING PER THE REQUIREMENTS OF THE "LATERAL BRACING" SECTION OF THAT SPECIFIC ENGINEERED TRUSS DRAWING. ..\_lA'I01Il\"""" J/3/1e OWP 04/1012006 15:58 FAI 13177383440 DAVIDSON IN>> .. RYLAND IgJOO% ':~':i'-~:.~';21!'i!g~~L~~~!~~~~ --: . , . :. .. Phone!~l!'1~;.~;TolI,,,,,,,(!IOOr7s7-32'11.. Fax:(a1'l738-a4-tO : . . 04110/06 To whom it may concern, It is my W1derstanding that concern has been expressed over the practice of nailing roof trusses to non- load bearing interior walls because of the potential problems if ceiling-partition separation occurs or there is differential movement between the truss and the wall:from. some other cause. Under extremely unusual circumstanecil the tross could pick the wall up off the floor. However, it is much more likely that the nails used to attaeh the tross to the wall will pull out (asswning two typical nail gun 10enails are used). Under typi9al residential cm:umstances even if1be trusses did pick the wall up, the wall would not add ." . N enough weight to the trusses to cause auything other than a cosmetic problem. Typical residential circumstances would be 8' to 9' wood-frame 2x4 walls with 1/2" dIywaIl, trusses 24" ole with 20-1 O-(U) p.s.f. loading, and typical ceiliDg construction. In other words, this is llDt a structuraJ. cause for concern and under most circumstances only has the potential to, in rare cases, cause cosmetic problems. To avoid any potentia.! problems that ClI11 arise in the rare event of cei1ing-partltiOIJ separation we recommend, but do not require, that the trusses not be attaohed to these walls or attached with as flexible a conneotion as possible. One way of doing this is a metal angle with a vertically slotted hole to allow truss movement. Another wery is to nail siIJBle plated walls to the trusses with a single nail straight up through the bottom of the wall fop plate at each truss. This creates a connection that is capable of supporting vll1)' little vertica11oad. We also recommend that one of the methods of floating the dtywaII comers be used to avoid dtywalIjoint cracks. These methods are discussed in some of the literature produced by the Gypsum Association. However, as stated before while we recommend the tnJsses not be nailed to the non-bearing walls we have llD such requirement, and this recommendation is not to be used in any way to require a fuuncr or home builder to modify then: construction practices. Jfyou have any questions please feel free to call me. I can be reaahed at (317) 738-3211. ~'"H""',,,I. ...,\>. \.. He,~ "''''' t$i8~~~ ~"':i.~ ~ ! ,..... - :I' llO910419 e \~ATEOF~i ~ INDl"~ ,- rt;;, ~ ~.. \\,,~ :f"""rtJll"\\\ S~l~ / ~ Hein<mlA". P.E. Teclm.ica1 Services Manager ~& ,.i< ~\\ ..." "r~~ '-,/~..~;,~~ . .~101Z.0jl.8,,1,~~S8~F.u 131!73..~~';::::--_;~ilU..~.. ~ . --.....'.\ .A.:,-. ." "';{'TIc...