HomeMy WebLinkAboutEngineer's Framing Letter 04.20.2023STRUCTURAL & CIVIL, INC.
EN61NE16S I C0NSTOUC10RS
April 20, 2023
Garfield County Building Department
108 8th Street
Glenwood Springs, CO 81601
Attn: Garfield County Building Department
Re: Davis Residence — Flagged Inspection Items
Dear Sirs:
Project No. 21639
This letter is in response to items flagged by the building inspector during framing inspection at the Davis
Residence located at 75 Horseshoe Lane Glenwood Springs, CO 81601 (Aspen Glen) on April 12, 2023.
The inspector expressed concern over the items listed below. The contractor provided photographs and
documentation of the conditions and Glenwood Structural and Civil, Inc. also visited the site on April 20,
2023 to observe the flagged items.
The items flagged by the inspector and our office's responses to each are presented below:
1. (2) 1 '/4" holes for plumbing penetrations were drilled through the center of a solid 7" x 11
7/8" LVL beam on S2.2 south of grid F between grids 6 and 7. A (1) 1 '/4" diameter hole for
a plumbing penetration was also drilled through another solid 7"xl1 7/8" LVL beam on grid
J, between grids 6 and 7 also on S2.2.
GSC Response: Glenwood Structural observed the holes in both beams in the field and finds that the
penetrations in the beam are acceptable without reinforcement or reframing.
2. A deviation from the structural drawings was observed with respect to overframing above
the garage on Sheet S2.2.
GSC Response: Glenwood Structural observed the overframing above the garage and requires that the
overframing currently in place be supported by new framing as follows:
New 2x8 rafters spanning north to south shall be provided at 32" o.c. tight under the existing BCI
overframe rafters which currently span east to west. These new 2x8 rafters shall be hung from new 2x8
ledgers using Simpson LUS26 hangers. The new 2x8 ledgers shall be attached to the existing gable end
walls at the north and south sides of the overframing using (4) 16d nails to each stud or gable end wall
top plate throughout the entire length of the walls. This information was verbally explained to the
contractor on our site visit.
3. Concern was expressed over a roof connection condition on the west side of the upper -
level window on sheet S2.4 on grid 6 between grids O and P. This condition was not
originally detailed, and the contractor supported the low roof BCI rafters off a low 14" LVL
that spanned north to south to the sloped (2) 14" LVLs on either side of the high roof
framing. This 14" LVL rafter was hung at its ends from the sloped (2) 14" LVLs by
LSSR1.81Z hangers. BCI rafters were hung from the low 14" LVL by LSSR 2.37Z hangers.
GSC Response: Glenwood Structural observed this condition and has instructed the contractor to
provide additional nailing from the low 14" LVL to the adjacent bearing wall studs. The contractor was
instructed to provide (3) new 16d nails from the 14" LVL to each stud along the entire length of the wall.
Hangers used by the contractor to support the BCI rafters from the 14" LVL are acceptable.
Please visit our website at www.glenwoodstructural.org
812 Pitkin Avenue, Glenwood Springs, CO 816011 email: gsc a�sopris.net I Phone (970) 928-0135 -
Davis Residence - Flagged Inspection Items
4. Framing clarification was requested for two overframe areas - one over the master closet
and one on the east side of the fireplace.
GSC Response:
Overfrarning area over the Master Closet space (Grid 14M to Grid 17H):
Glenwood Structural observed the way this portion of overframing was constructed and found the
condition acceptable without requiring reinforcement or reframing.
Overframing Area at the Fast side of the Fireplace (Fast of Grid 15 roughly between H and C
grids):
Glenwood Structural observed the overframing at the east side of the fireplace and requires that the
overframing currently in place be supported by new framing as follows:
New 2x6 rafters spanning east to west shall be provided at 24" o.c. tight under the existing BCI overframe
rafters which currently span north to south. These new 2x6 rafters shall have (3) support conditions. The
first support shall be at the west end and shall be a 2x6 ledger supported by the existing gable end wall
framing. (3) 16d nails from the new 2x6 ledger to each stud of the gable end wall shall be used to support
this ledger. Simpson LUS26 hangers shall be used to support the new 2x6 rafters from the new 2x6
ledger. The intermediate rafter support condition shall be a conventionally framed 2x6 pony wall which
shall be located directly above the existing truss panel points below. This pony wall shall run north south
in the overframe space and the new 2x6 rafters shall bear directly on the top plate of the new pony wall.
(3) 10d toenails shall be used at each 2x6 rafter's attachment to the new pony wall. The third support
shall be at the east end of the new 2x6 rafters and shall be a 2x cleat that will be attached to the underside
of the existing overframe 2x's. This information was verbally explained to the contractor on our site visit.
5. Framing clarification was requested for the overframing area above the guest bedroom
North of grid N and East of grid 1
GSC Response: Glenwood Stri drti dral obsenied the overframing at this location and require s that a
conventionally framed 2x6 pony wall be built between the existing overframe rafters and the low 14" BCI
rafters south of the (2) 16" LVL ridge that spans between grids 1 and 6. This wall shall be framed tight
to the existing BCI overframe rafters above. In plan, this new pony wall shall start on grid N just east of
the door header below on this line and continue along an angle parallel to the line of overframing at the
west. This wall will terminate at the ridge line in plan. This information was verbally explained to the
contractor also.
In lieu of the 2x6 pony wall solution above the contractor may provide an ad ditinnal cistered 14" BCI
5000 1.7 DF rafter at each penetrated low BCI rafter south of the (2) 16" LVL ridge beam. This information
was verbally explained to the contractor as well.
6. Detail 14/S4.1 was used for the support of lookouts on 52.4 east of grid 1 and between
grids N and J, but i-Joist rafters were used instead of LSLs for the lookout master. 1-joist
rafter webs were packed out on their west side only.
GSC Response: Glenwood Structural observed this condition in the field and finds that the I -Joist rafter
lookout master member is acceptable in place of the LSL at this location. Packout of a single side of the
lookout master web is also acceptable.
2 1 I r.
Davis Residence - Flagged Inspection Items
7. Clarification was requested with respect to the location of the header which supports the
roof ridge at the west side of the fireplace just west of grid 15 on S2.4. This header was
installed high at the roof level rather than at the low location above the firebox indicated
in plan.
GSC Response: Glenwood Structural observed this condition in the field and finds that the header
framed at the roof elevation instead of low at the firebox elevation is acceptable.
The contractor also provided Glenwood Structural with the requested Welding Procedure Qualification
Records (WPQRs) as per the General Notes sheet S1.1. Welding certifications were obtained from
Sopris Steel.
Please advise if there are any additional questions or if we may be of any other assistance.
Respectfully submitted,
GLENWOOD STRUCTURAL AND CIVIL, INC.
Walter Gorra, M.S., P.E.
Project Manager
Reviewed by:0FG
Adolfo O. Gorra, M.S., P.E.
President
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