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Home My WebLink AboutEngineer Report 11.24.17S K PEIGHTAL ENGINEERS ttd .STR UCTUR AL CON SULTANTS FIETD REPORT To From Date Edgar Hernandez Stephen Peightal, PE November 24,2017 page 1 of 3 Re Limited Observation VanDevander Residence 2074 County Road 109 Garfielcl County Those Present: Edgar Hernandez Stephen Peightal On site 77-77-17 at the request of Don VanDevander to observe construction, and to submit a professional opiñion at several areas of concern_to the County Building Departmônt. Unless noted otherwise, my references to Construction Documents refers to SKPE set dated 06-76-76. Per our Letter Of Agreement, the intent of our site visits during construction is to become generally fãmiliar with the progress of the contractors'lvork and to determine if the wofu is proleeding in general accordance with the structural construction documents. The CLIENT hai not retained the ENGINEER to make detailed inspections or to provicle exhanstive or continuous project review a,nd observation services. The ENGÑEER does not guarantee the performance of, and shall have no responsibility for, the acts or omissiıns of any coÑractor, subcontractor, supplier or any other entity furnishing materials or performing any work on the project. It is noted that Mr VanDevañder has elected to not involúe our office during the construction phase up to this point, and we can only respond to items available to view. Item-1: Beam Penetration Refer to Upper Floor Framing Plan sheet 52.1. Refer to existing floor beam noted as 3-77718" VL. A2712"øbeam penetration was observed located approximately S.S-feet from the east support cılumn, and 7-inches bottom of beam to bottom of hole. Recommenclation Material stress values have been calculated for full design load, and are found as acceptable. No additional work needed' Item-2: Pre-Fabricated Truss Bracing. Refer to Roof Framing Plan shcct S2.2. New roof trusses were placed over the Living Room, Master Bedroım, and Exterior Entry areas. Observed construction verifies the roof assembly in place over the top chords. The bottom chords of the Living Room and Master Bedróom ãreas are preparèd lor the coming application of the interior gypsum board finish. The bottom chorãs of Lhe Exlerior Entry have a soffit finish material applied. SKPE . ZgA Park Avenue - #3O1 - Basalt, CO. 81 621 (97O) 927-951O' skpe@sopris.net page 2 of 3 Recommendation I have reviewed the truss shop drawings prepared by MiTek IISA, Tnc, for these three areas. The truss designer indicates trgss bracing per'the shop drawings, to be required o¡ly 3t the top and bottom chords. The means óf bracing is noted as ðiructural wood sheathing applied directly to the top chord, and rigid ceil"ing applied directly to the hottom chorcl. No web members àre noted to neéd bracing. - ^ Assuming plywood size, gradíng, and nailing per General Notes sheet S3.1 for the roof sheathing, the top chords are accepted as propèrly bracecl. Assuming the Exterior Entry soffit js placed_per code, the bottornchòrds are accepted as properly braced. Assuming the yet_to be applied finish ceiling gypsum boaid is plaðed pertode, the bottom chords will be accepted as properlybiáCed. No additiônd work needed. ltem-3: Roof Overframing Refer to Roof Framing Plan sheet 12.2. Refer to areas over the Kitchen/Living Room, Master Closet, and Entry noted as having stick framing (overframing) over thË truss system per detail 5/S3.1. Recommendation over Kitchen/ Living Observed rafters as 2x6 spaced 12" on center. These rafters span parallel to the trusses, from the exterior wall to the truss sheathing approximately 6-feet. At full design load these rafters are found as acceptable. The Ëwei' ends lap ánd spike to the 2x7í rafter ends with 4 nails, also_found aè acceptable. The upper eñds beai.on a flat 2x timberstrand plate. This plate appears to distribute overframing load to the truss panel poinf and is also found as acceptable. It was noted that the 2x72 rafter ends along this bearing wall are without blocking. Solid blocking between all joists ancl rafteri at supports is noted by the General Nätes sheets S3.1. This blocking work is recommended^. ^ Recommendation over Master Closet Observed rafters as2x6 spaced 24" on center. These rafters span perpendicular to the trusses, from a 2x ridge board dg_lvn to a2x flat lumber valtey plate. The longer span is about 8-feet from the ridge to valley. The support valley plaie runs over the-trusð top chords at varying locatioñs. An analysis-of this existing overframing finds the longer rafters as approximately 20/o overstressed in bending. Due to the framing parameters, a horizontal force of approximately 587# is expected at the valley end of the longer rafters. There is no system inplace to resist this horizontal reaction. In addition, the truss system is not designed to accept the valley loading as a concentrated force. The intent of detail S/S3.1 is to avoid the shortcomings of the stick framing as described above, and maintain a uniformloading t-" tttg truss system. _ It is recorimended that the overframing as indicated by detail 5/53.1 be appliect here. Recommendation over Entrv ndcrstandingthatthisoverframingisasfoundoverthe Master Closet, to a smaller degree. It is recommended that the overframing as indicated by detail 5/S3.1-n-e applied here. SKPE ' 298 Pa¡k Avenue' #301 . Basalt, CO. S1 621 (t¿l0) 927-19ls10. skper@sopris.net Page 3 of 3 Item-4: Bearing Wall SuPPort n"r", to uppeinoor Fráming Plan sheet S2.1, and Foundation Plan sheet 51.-t. Refer to ift" Ú"*m[ii"" between Recieation Room and Wet Bar/Cards' The support -system for the indicated existing 3- 77 7 18- vL floor beam is noted as a series of wood columns, bearing on the "ririing iravel footing. This design was issued after Mr VanDevander lã]"ä?nãïÀi1ã"r¿ nðúccept o.r. píior design ın oqr 05-04-16 issue, of a single steel column to bear on a new coricrete footing paã. Based on this observation visit, it ;pp";;; ihãiin.ri"gle column approach"of our prior 05-04-16 set was actually used.. without notice to usi Assuming our plans were ?ollowed this is acceptable to our office, no*"rr"r a critical bearing walisupport item aPpears to have been missed. Recommendation 1l1litt*t* t*tp "f l¿r Hernand ez, wer,vere able to determine that the2x6 bearing wall. ubãrr" tli" existing floor beam, are not aligned.--The entire sill-plate of. the bearing wall ,ãt, off of this flo"or beam, and bears orrel the floor I-joists. No blocking exists between iñ" iãirtã, ;ã th" joist hangers aïe gTperted to be ovêrstressed. Refer to our detail g lSg.l. It is recon{-ã"i"air-,at the bläckingìndicated below this wall, and to the side of the existing beam, be provided as noted by that detail' Item-S: Shear Walls Refer to Roof Framing Plan sheet 52.2, and.Upper Floor Framing Plan sheet S2.1. Refer io *ullr with notes inäicating shear panels anã-size. These shear wall material and nailing patterns are defined Ëy the ieneral Notes on sheet S3.1. Wall insulation was ı;;äi; ;iew shear panels át the.Living Room, and. at the Master Bedroom. No bi.;ki;ìg-as founJuläng the panel edgeË, between studs. B-lgckingj,f all shear wall ådn", is"critical to lateralþerformance, ãnd is clearly directed in the General Notes on ;h8JSã.i. Ïi;"; to assu'me that this is representative of the typical condition of project shear wall application. Recommendation M. H".r,undez reports that the County approved of tþ,e sheathing nailing pattern,-soìt ir ã*-"¿ that oirr shear wall nail pa'ttern as directed by-the General \gt":t sheet S3'1 ñ",lã;et, with the exception of the edge blockilg. The exterior wall finish s.lrstem l, ã¡r".tr"a inplace, ro u.."r, to the exterioî face of sliearpanels.is difficult to facilitate .,uifl"g of any^added blocking. It is recommended that alternative connection-systems b" r"rrT"*edio allow work töbe performed from the interior. fþis-ma| involve uáh"rirr"r, and possible lateral .o.tt.ib.ttion from dry-wall,sYsle3s,.but will involve analysis beyonå the scope of agreed items to be reviewed-by this visit' Mr Vanbevaná"..ur retairi anothËr structural engineering office for this analysis and ,oi.rão., or this office is happy to discuss providing thóse services. The current framing conditions as observed at tirò äh"ur walls áre not acceptable to our office. The abot;e rept.esents otn. repot't of euents noted and itents disct'tssed, nnd will be relied upott øs ttl.tie and corl'ect by nlt pnrti'es utiess rtotified zoitlin 5 working days of receipt. 16011 FR sKpE . zga park Avenue. #3O.1 . Basalt, co - 81621 (97O) 927-9510' skpe@sopris.net