Laserfiche WebLink
. ��-�/��� Stnlct.ural Desi�n :ls�c,ci,ires <br /> � — Fr��iia�:erirt� .S�rucizrn�s�ro Lr�,1 <br /> Januarv 19. 2010 <br /> Greg Elwood <br /> 326 I-3eather Rd <br /> r��erett, WA 98203 <br /> Subject: Hole in Joist <br /> To whom this may concern: <br /> At thc request of Greg I:Iwood, this office re��iewed the subject project to determine the <br /> result of drilling a 3 '/Z-inch diameter hole at mid-span of a 2x]0 DP # 2 tloorjoist, and <br /> splicing a ceiling joist 4'-0" from the support. <br /> Calculations show that a 2�10 DP#2 tloorjoist, spanning 8..i8 fcet is structurally <br /> inadequate for typical residential 17oor Ioading. A %<-inch thick, steel plate both sides of <br /> the joist are required (sce detail 1). When the distance from the bottom of thejoist to the <br /> bottom of the pipe is less than 2-inches, detail 2 must be used. <br /> 1-loles drilled near the center of the joisL located 1-foot from the support �are structurally <br /> acceptable. <br /> Notched joist 2 '/-inches dcep on Uie tension face, near the electric panel is structurally <br /> adequate. A '/" diameter z 6" lag screw must be installed 6" in front of the notch (toward <br /> mid-span)to eliminate crack propagation. <br /> The ceiling joist, nail laminated�'-0" in front of the support, are structurally inadequate. <br /> Sister a ne�v, ful] -span ceiling joist against the existing joist and nail laminate widi 16d <br /> spaced at ]6" o/c (staggered). <br /> If there are any questions about this report or if I can be of any further assistance, please <br /> feel free to call me. �"�;� � <br /> >15 COY"j'f��.,i <br /> er� t �o n•s, '�5,�'^�,oF W�SHi,'1' `► <br /> � - � ;``� �Ca O Fy3. <br /> Chris Co mg on, P.E. �> — . <br /> � ,�,sa e,i �; <br /> \ F :� `:', <br /> �s/ r;«;;.;i <br /> C��W+1 <br /> �.11p1 A2 m� � <br /> � :. �, , �:�� � ,=_, _ -, �Y��o��� <br /> ��'�t � S I'IKi�Ci.���l❑ � <br />