1209 MADRONA AVE 2016-01-01 MF Import

Towner�Schuld�Canfield, LLC Pro;ect No. C96130 LetterNo.i 2. The lateral bading to required existing structural elements is not increased beyond their capacity, and 3. New structural elements are detailed and connected to the exis:i,ig structural elements as required by these regulations, and 4. New or relocated nonstn•^tural elements are detailed and connected to existing or new structural etements as required by these regulations, and 5. An unsafe condition, as defined above, is not created' Based on these requirements, we believe the additions you desire can be made withoul undue expense. The shear strenglh lost by romoving a twn fcot wall panel in the dininc� room can bs restored by adding two tie-down straps to ihe four-foot wall panei at the southem end of the west wall, as shown on the attached drawing. The shear strength lost by adding a doorway from the stairwell into ihe study can be restored by removing all wall coverings on the wall and sheathing K two levels up with 3/E" OSB. Tie-down straps should be installed to connecl the upper wall to the lower wall on both sides of the new opening and to connect both sides of the o�ening to ihe double joist below. In three locations beneath ihis wall where a girder supports the double joist bebw, a Simpson H6 connector should be used to tie the joist down to the girder. This should also be done at the next girder noAh of the wall. Please see ariached drawings. The patb door in the north wall of the basement should be installed in one of the two easternmost openings. The panel between lhese openings should be reduced to accommodate the patio door. The shear strength lost can be regained by in-filling tho westemmost window with wall framing and covering il wilh minimum 3/8° wood structural panel sheathing. Sheathing should be nailed to all studs and plates and along ali panel edges with Bd nails � 6' o.c. The opening betwsen ihe d(ning room and the living room may be widened three feet. This will require ihe installation of a 1-3J4' x 11 microlam header. The shear strength last by increasing the opening width may be replaced by removing all wall covering on the living room side and replacing with min. 3l8' wood structural panels, nailed along all panel edges, along all studs and abng all ptates wRh 8d nails at 6' o.c. Solid blocking should be (nstalled between joists directly below ihe wall. A �hearwall should be Installed in ths basement to transfer the shear lo ihe foundation. This shearvvall shoukl have a minimum of twelve feet of wall, consisting of panels at least four feet long. One of the panels should be at least eight feet long. If the northemmost column line fs removed and the floor framin� mod'rfied, the new shearwall in ihe basement may be installed at the next column line south. If the floor framing is not to be med'rfied, the shearvuall should be installed d'�ectly below the wall above. In both cases, ihere should be solid bbcking directly above ihe basement shearvall, and it should nailed to ihe shearwall with 16d's at 4' o.c. The bottom of the wall should be anchor-bolled to a min. 1'-4' wide by 1'-0' deep footing with 1/2° diamoter botts at 36 inch spacing. Ii a door is placed in the wail, one side should be a minimum of eight feet bng, the other four feet. Boih sides should have Simpson LTT20's installed at double studs 3t es�ch end to tfe the wall down to the footing. The footing should have (2) contir.uous #4's, grade 40, at mid-depth, full length. The northernmost column line in the basemenl may be replaced by suitable framing. This will require the addition of 3-t/8° x 6" F24 glulam purlins along the original column line. These should span 6'-6" between 5- V8" x 9" F24 glulam beams spanning between the north wall of the basement and the second column line from the north wail or the new shearwall. The existin� 2x6 joisis may remain, and wili span between the new purlins and ihe north waii �r the shearwalVexisting 6x6 beams. Joists should bo framed Page 2 of 3