HomeMy WebLinkAboutEngineer's Framing Letter 01.09.24
January 9, 2023
Attn: Simon Casas
RE: The residence located at 31 Royal Coachman, Carbondale, Colorado. In December of 2023, the
owner & contractor notified Rocky’s Engineering LLC of framing inspection items to be reviewed
by engineer of record. Please refer to the structural drawings by Rocky’s Engineering LLC, dated
4/19/2023 for Revision #1; & Sheets dated 5/22/2023 for Revision #2.
To Whom It May Concern,
The purpose of this letter is to address the framing items that need repairing after framing
inspection.
Item #1: Beam At Top of Stairs
Contractor to provide simpson L90 Angle at location shown in photo below is sufficient
L90Z Angle iron as shown
Item #2: Column to Beam connections
Contractor can provide ML26Z angle at each face of column -OR- Simpson AC6 column caps. See
photo below.
ML26Z angle shown at beam to column condition
Item #3: Holdowns at West side of rooftop deck at upper level
In lieu of HD1* holdowns, Contractor can provide minimum HDU2-SDS2.5 holdowns at upper
level with appropriate sized lag screws into top of glulam beam with minimum 4” length into
glulam. See photo below.
HDU holdown with lag screw
Item #4.1: Top plates not over lapping at gable end walls at BR 2
For framing to be sufficient, Contractor can:
1. Fur out the corners with 2x6 & 1x6 studs as required
2. Attach studs with F10 x 10” screws at 16” o.c. spacing
3. Provide L90 angles at 16” spacing at corner of wall
See photos below:
Wall Corner F10 x 10” screws L90 angles
Item #4.2: Ridge beam bearing over windows at gable end BR 2 Wall
See photo sketch below: Contractor to provide minimum:
Ridge beam bearing at north gable end wall to have minimum (4) 2x6 post pocketed into
wall framing (As noted on schedule shown on drawing S1.1 & S5 for “RB7”) continuous
(or blocked) to header below
Provide minimum ¼”x10” lag screws from east studs at 3” staggered spacing into studs to
help transfer loading to jack studs between the windows.
Repair sketch (see comments above) Photo of existing conditions
Item #5: RB4; RB5; & RB9: See photos below
Where RB4 & RB5 bear on RB9; the framing as shown in photos is sufficient. Contractor
to provide minimum (2) ¼”x5” toe nails at each face of column to beam -OR- provide
Simpson CJT3Z concealed connection. Provide angle connections similar to ML26Z from
column to bridge floor as necessary.
o At each beam to column connection
Contractor to ensure that minimum (4) 2x6 built up column is set in the north bathroom
wall (separating bathroom and stairs) is set in the wall framing for support of RB5 (as noted
on the schedule on Drawing S1.1.)
o Column to be continuous (blocked between floors) to foundation system
RB9 bridge beam looking north RB9 bridge beam and columns with RB4
bearing above
RB5 bearing columns at RB9 12x12 post RB5 looking south
If there are any questions, feel free to contact me at the information below.
Sincerely,
Michael Campbell, PE
Structural Engineer
(970) 389-4895
rockysengineering1@gmail.com