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HomeMy WebLinkAboutFile Documents.600 E Main St.0010-2022-BREP (3) STRUCTURAL DESIGN 1040 MAIN STREET I CARBONDALE,CO 81623 I (970)510-0773 evolvestruct.com August 15, 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 Building 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, — „p,D O .. 2.0 k� Evolve Structural Design LLC Reviewed By: fc0\ Mic �Fp 1I Jr 8/15/22 N /4r2777( % 43316• i Jonathan Steurer, P.E. Sara Mickus, P.E. w '' S 4�� • • :•• _i Project Engineer Principal �����"� = 1/4"x8"STL PLATE / 3 4 / LM EA SIDE WITH 5/8"0 TO(E)STL PLATE • A307 THRU-BOLTS j(E)STEEL PLATE 3/16 V1/4"x4"x0'-8"STL :1C4 N =�o i PLATE EA SIDE _ o oEXTENT OF DECAY CUT LINE REPLACE 3 1/2"x8 1/2" v o J z RIM BEAM I m o i_ I- w co `,♦ p— — O O O v� C/] (E)6x10 CANTD o - ;� N WOOD BEAM a •♦ I I ♦ °' u_ v 10" 4"41/2" N 0,-) SIDE VIEW or 1'-8" 8 1/2" 5" 1 (2)5/8"0 THRU BOLTS E.F. STEP 1 \k X 1 1/2" 41/2" 3'-3 5/8" . SIDE VIEW 1'-2" STEP 4 z REMOVE DECAYED o WOOD AND 2"BEYOND _I co O 0 H 0 r w ,_, , o _ • • _(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 _o I U z SIDE VIEW z I—_ ni STEP 2 DECKING(BY OTHERS) m W SLEEPERS(BY OTHERS) o I_I_1111.1• U a ,L (n FLOORING SHOWN NOT TO BE INSTALLED WATERPROOFING MEMBRANE a °I ° Z Q UNTIL BEAM REPAIR COMPLETED (BY OTHERS) u o —11---, V I _-�3/4"PLYWOOD SHEATHING U z BIM 0 2x MATERIAL @ 16"o.c.3/4"TAPERED TO 0" THRU-BOLTS m 2x6 STRUCTURAL DECKING w/ DATE: 8/15/2022 o (2)#10 x 3"LONG WOOD SCREWS _,��.����m� (E)6x10 CANTD 1x6 FINISHED CEILING MIDDLE EAM Lu PLAN VIEW ,0 . .. LI�FZs11, PROJECT#: 21.233C WOOD BEAM C> Ii.M M/CI • 0 III DRAWN BY: JS REPLACE END OF BEAM IN KIND ;„Q' 8/15/22 cn. SIDE VIEW DF-No2 OR BETTER , S 43316 // 1CHECKED BY: SM k STEP 3 CONTRACTOR SHALL VERIFY ALL NOTED CONDITIONS IN /•i , 3 1 ' THE FIELD. NOTIFY S.E.O.R.OF ANY DISCREPANCIES. es:,/'•••••' ,G ‘`\, Q"` DECK MIDDLE BEAM REPAIR _ SK—S 1 SCALE: 3/4"=1'-0" Z (2)SDS SCREWS x 6"LONG 1 CM MIN 2"PEN INTO NEW WOOD C/] w 1/4"x8"STL PLATE 1 1 0 E o co 2_p EA SIDE WITH 5/8"P1 3/16 V 1/4"x4"x0'-8"STL/ / Q o A307 THRU-BOLTS PLATE EA SIDE Z ,om z EXTENT OF DECAY CUT LINE REP L ACE 3 1/2"x8 1/2" o z_ (TRUE)END BEAM 'I NI 1— co ,� 5 \ o — © -go- e — o o ' ow co • o M\ o — © {g 0- 0 — 0 0 N �, C/7 (E)6x10 CANTD \ \ 1 1 1 N M WOOD BEAM u_ 101/2" 3" 4" 4" N M SIDE VIEW k 2'-0" k 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" / / zo REMOVE DECAYED o WOOD AND 2"BEYOND - - BUILDING BUMP OUT WHERE OCCURS O 60.0° . r w \ — • • ~ Q (E)6x10 CANTD z z WOOD BEAM z D O D V.I.F.WOOD BEYOND IN GOOD o yV J O CONDITION NOTIFY SEOR OTHERWISE m °� O U I I O CUT AT ANGLE SHOWN o . °- l0 U Z SIDE VIEW U u thi e 1 H z ii STEP 2 DECKING(BY OTHERS) " N W W SLEEPERS(BY OTHERS) \ REPLACE END BEAM U Cl..( a 5/8"0x5"LONG LAG SCREWS THRU-BOLTS w/WASHERS ON Z FLOORING SHOWN NOT TO BE INSTALLED WATERPROOFING MEMBRANE WHERE OPPOSITE SIDE NOT — < UNTIL BEAM REPAIR COMPLETED (BY OTHERS) ACCESSIBLE OPPOSITE FACE OF STEEL PLATE / 0 � 1 i 3/4"PLYWOOD SHEATHING 0U � �� m p o edi 2x MATERIAL @ 16"o.c.3/4"TAPERED TO 0" PLAN VIEW DATE: 8/15/2022 m 2x6 STRUCTURAL DECKING w/ END BEAM o (2)#10 x 3"LONG WOOD SCREWS ,��..www k (E)6x10 CANTD 1x6 FINISHED CEILING =•QS\. .O LiCe. . /1/ ,I PROJECT#: 21.233C w WOOD BEAM i V�:.P• ... MSC..FO Ito REPLACE END OF BEAM IN KIND •�P 8/15/22 C;.• �� DRAWN BY: JS SIDE VIEW DF-No2 OR BETTER S 43316 • /� • . ., i� CHECKED BY: SM STEP 3 CONTRACTOR SHALL VERIFY ALL NOTED CONDITIONS IN ,I�r>��s•3"..1 THE FIELD. NOTIFY S.E.O.R.OF ANY DISCREPANCIES. ik%`,GIN` � DECK END BEAM REPAIR SK.s2 \4-_ SCALE: 3/4"=1'-0"