22.012 ~ Lang Site Built Truss ~ 05-03-23May 3, 2023
#22.012
Sara Lang
19637 801h Pl W
Edmonds, WA 98026
Subject: Site Built Girder Truss
Plan Number: Lang Addition
Site: 19637 801h Pl W
Edmonds, WA 98026
Mrs. Lang,
Phillips Structural Engineering, PLLC (PSE) as requested has reviewed the condition
where your General Contractor (Built By Design, Inc.) has provided a roof retrofit for
existing conditions that the City of Edmonds is requiring some Engineering
documentation on.
It is our understanding that the roof had a minor amount of sag in it and Built By Design
has retrofitted the areas under consideration with new ceiling joists and a 3 ply truss.
Please find attached a partial roof framing plan indicating where the truss was installed
and necessary upgrades/retrofits to increase its strength. Trusses shall be attached to one
another with TimberLOK TLOK06 screws as indicated in detail 2/SK through the layer
of 3/4" plywood on the side where the beam has been added (reference ICC ESR-1078 by
OMG, Inc.). A Simpson MSTC66 strap shall be added to the opposite side of the multi-
ply truss attached to bottom chord and added 2x4.
See attached for additional information. All other aspects of design and conditions on
site including construction methods are per the approved structural drawings. If there are
any further questions or concerns, please feel free to contact our office.
Sincerely,
Todd M. Phillips, S.E.
Phillips Structural Engineering, PLLC
Phillips Structural Engineering, PLLC
PO Box108
Milton, WA 98354
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END (FUR WALL AS 4x6 POST W/
RING); PR❑VIDE LCE4 24'x24"x10" UNREINF.
OSITIVE ATTACHMENT CONC. PAD BELOW
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2x6 CEILING JOIST @ 24' O.C.
2x6 CEILING JOIST @ 24, O.C.
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(E)GIRDER TRUSS TO
BE REINFORCED
(2)2x6 MIN.
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EXISTING MILD PITCHED SCISSOR TRUSSES 2 24' O.C.
N
O
W
2x6 RAFTER @ 24' D.C.
W/ COLLAR TIE @ 4' D.C.
LOCATION OF DUTCH HIP
GIRDER TRUSS (MINOR)
(2)13/4"X9/4" LVL VALLEY BEAM
SPANS FROM INTERIOR BEAM AT
CENTER TO EXTERI❑R WALL
(SIMILAR AT OPP❑SITE SIDE)
1,2
SK
PARTIAL ROOF FRAMING
SCALE: %4" = l'-0"
00 (2) NEW TRUSS PLYS HAVE 2x6 TOP
AND BOTTOM CHORDS
00 (1) EXISTING TRUSS HAS 2x6 TOP
CHORD AND 2x4 BOTTOM CHORD
00 EXISTING ROOF SHEATHING NOT SHOWN
\Ll L_A I LI\1 Li 1\
WALL
SITE BUILT GIRDER TRUSS
(10) TIMBERL❑K TL❑K06 SCREWS AT
TOP CHORD EA. SIDE OF CENTER
THRU PLYWOOD TO MULTI -PLY
TRUSS @ 12" O.C. (STAGGERED)
APPROX. SHEATHING
SPLICE 48" FROM CENTER
(3) PLY TRUSS SHEATHED W/
3/4" PLYWOOD NAILED AT 6" O.C.
TO ALL MEMBERS (EA, PLY TO
HAVE A LAYER OF SHEATHING)
(14) TIMBERL❑K TL❑K06 SCREWS AT BOTTOM
CHORD EA. SIDE OF CENTER THRU PLYWOOD
TO MULTI -PLY TRUSS @ 6" O.C. (STAGGERED)
SHEATHING & TRUSS TO
TRUSS ATTACHMENT
ADD NEW 2x4 OVER (E)
BOTTOM LHWRD lOd P@ ❑g E �,
TOE
NAI
(E)2x4 BOTTOM CHORD
REMOVE (E) WEB IN TRUSS AS REQ'D
MSTC66 CENTERED ON TRUSS ATTACHED TO
BOTTOM CHORD OF (E) TRUSS AND NEW
2X4 AS SHOWN W/ (76)0,148"x3/4" NAILS
BACK SIDE VIEW GIRDER TRUSS
(EXISTING TRUSS MODIFIED)
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