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HomeMy WebLinkAboutFile Documents.600 E Main St.0010-2022-BREP (4) re km__ , _R__Y ____ STRUCTURAL DESIGN 1040 MAIN STREET I CARBONDALE,CO 81623 I (970)510-0773 evolvestruct.com June 21, 2022 Attn: Jim Smith Concept 600 Condominium Association, Inc. 600 East Main Street Aspen, Colorado 81611 RE: Concept 600, Unit 404- Balcony Deck Repair 600 East Main Street ESD Project#: 21.233C Per your request,we have designed structural repairs for the deck at the above noted unit. We reviewed the existing conditions during and after removal of finishes on April 20, 2022 and after removal of the decking on June 10, 2022. The original tongue and groove decking and supporting, cantilevered timber beams were observed to be damaged due to moisture exposure. The conditions have been outlined below. 1. The previous in-place structural decking was 3x6 tongue and groove. 2. The decking had shown signs of rot and decay and was removed. 3. The new structural decking will be fire treated, Douglas Fir No 2 or better, 2x6,flatwise, in a 3-span continuous condition. 4. The decking is supported by four wood beams that cantilever from the exterior wall of the building. 5. The span between the wood beams is approximately 4'-9". 6. Two of the four 6x10 cantilevered wood beams have shown signs of rot and decay at the ends. 7. The cantilevered wood beams should be repaired per attached sketches SK-S1&SK-S2. Recommendations&Conclusions: Structural analysis and design of noted framing was completed per the 2015 International Residential Code and the City of Aspen Amendments. The replacement decking noted is adequate for applicable design loads. Our analysis was limited solely to the decking and cantilevered wood beam repairs mentioned in this letter. If additional documentation or knowledge of structural conditions becomes available that differs or expands from that mentioned herein, we shall be contacted to reassess the structure, and reserve the right to amend our opinions and report accordingly. Should you have any further questions regarding this matter, please feel free to contact our office. Sincerely, `,�...�ANN v. Evolve Structural Design LLC Reviewed By: O\,r.••..........So 11 i �':42' �''F c(i26L) A4e77( l Jonathan Steurer, P.E. Sara Mickus, P.E 1�� S• ' , . J Project Engineer Principal ‘‘‘,\`0"`E-- 1/4"x8"STL PLATE / 3 4 / E EA SIDE WITH 5/8"0 TO(E)STL PLATE — A307 THRU-BOLTS j w 0 E R, 1'-0" o / / (E)STEEL PLATE 3/16 V 1/4"x4"x0'8"STL Q N o o PLATE EA SIDE =411. t o oEXTENT OF DECAY CUT LINE REPLACE 3 1/2"x8 1/2" v o _Iz 11411V— / RIM BEAM I co _1 0_ - 1_1011 I- w co `�♦ 0— — 0VA O O Al i C/] (E)6x10 CANTD o --;! N WOOD BEAM a I I 1 I ' °' v 10" 4"41/2"" N 0,-) SIDE VIEW 4 1-8" j, 8 1/2" 1, 5" 4, / (2)5/8"O THRU BOLTS E.F. STEP 1 \1 1/2" 4 1/2" 3'-3 5/8" . SIDE VIEW 1'-2, STEP 4 z REMOVE DECAYED WOOD AND 2"BEYOND co � O o . . _ ._. Q (E)6x10 CANTD Z Ce z WOOD BEAM D 0 D V.I.F.WOOD BEYOND J O IN GOOD CONDITION O 0 U NOTIFY SEOR OTHERWISE SIDE VIEW o J .i. .i. .i. zSTEP 2 0 _I_I_11111111 CI_w . . ,. .,. _I U (J a ci ..1 : z Q O U REPLACE END OF co z BEAM IN KIND o DF-No2 OR BETTER THRU BOLTS DATE: 6/21/2022 co U- w PLAN VIEW — "``, (E)6x10 CANTD _D�p,OO LI. 'v��1 PROJECT#: 21.233C WOOD BEAM MIDDLE BEAM %�v0� �P•M"M;��SFo��/, i coQ' 6/21/22 U, t DRAWN BY: JS 0j • • 43316 • i SIDE VIEW CONTRACTOR SHALL VERIFY ALL NOTED CONDITIONS IN ; 0 CHECKED BY: SM STEP 3 THE FIELD. NOTIFY S.E.O.R.OF ANY DISCREPANCIES. / • l. . ,-- e .01.......e.g." DECK MIDDLE BEAM REPAIR SK-SI SCALE: 3/4"=1'-0" Z (2)SDS SCREWS x 6"LONG 1 LJ MIN 2"PEN INTO NEW WOOD C/] -I w 1/4"x8"STL PLATE I • 0 s / 2_p / A307 THRU-BOLTS EA SIDE WITH S 3/16 V 1/4"x4"x0'-8"STL Q o PLATE EA SIDE Cv Z ,om z EXTENT OF DECAY CUT LINE REPLACE 3 1/2"x8 1/2" o LO z_ A (TRUE)END BEAM 'I 1 \ NI 1- 0up u M\ 0O — © � 0- 0 — 0 0 .:���,:_ \ c� cv 1 C/7 (E)6x10 CANTD \ \ 1 N `' WOOD BEAM u_ 10 1/2" 3" 4" 4" / / N M SIDE VIEW k k 2'-0" 8" k 9" k 9" 1,4" (2)5/8"Ql THRU BOLTS E.F. STEP 1 \2 4'-8 1/8" SIDE VIEW STEP 4 2'-2" / / z REMOVE DECAYED o WOOD AND 2"BEYOND - - BUILDING BUMP OUT WHERE OCCURS O 60.0° 4 . r w \ — • • ~ Q o (E)6x10 CANTD z c z WOOD BEAM z D 0 D V.I.F.WOOD BEYOND IN GOOD o yV J 0 CONDITION NOTIFY SEOR OTHERWISE m o� O U CUT AT ANGLE SHOWN o I i '-\ U S U z SIDE VIEW Q N E z 1-1 STEP 2 N ww1- \ REPLACE END BEAM U ( 5/8"0x5"LONG LAG SCREWS THRU-BOLTS w/WASHERS ON Z < WHERE OPPOSITE SIDE NOT OPPOSITE FACE OF STEEL PLATE 0 ACCESSIBLE U REPLACE END OF o z BEAM IN KIND o DF-No2 OR BETTER PLAN VIEW m � `������0A\ DATE: 6/21/2022 O END BEAM _��p,DO Licep� o` :••... it;. of w y`rF',� PROJECT#: 21.233C < (E)6x10 CANTD v •Q,P C',� II WOOD BEAM i •:co 6/21/22 N; , : 43316 % DRAWN BY: JS I •• 3I SIDE VIEW Ili •• CONTRACTOR SHALL VERIFY ALL NOTED CONDITIONS IN I`,. _ , CHECKED BY: SM STEP 3 THE FIELD. NOTIFY S.E.O.R.OF ANY DISCREPANCIES. ,��`SS/ONAIE`,G+ /- DECK END BEAM REPAIR SK-S 2 _z- SCALE: 3/4"=1'-0"