HomeMy WebLinkAboutRe:structural engineering review J.H. Dahlmeier Engineering Inc.
February 1, 1996 g6
Walter Hagen
1130 North Shore Drive
Orono, MN 55364
Re: Residence Remodeling
Scissors Truss
1130 North Shore Drive
Orono, MN
Commission No. 96006
The purpose of this letter is to report the findings of a structural
engineering review of the new roof framing for the remodeled
residence at 1130 North Shore Drive, Orono, Minnesota.
ASSIGNMENT
J. H. Dahlmeier Engineering, Inc. has been retained to provide a
structural engineering analysis of the scissors truss under
construction as part of the remodeling of the residence at 1130
North Shore Drive, Orono, Minnesota as directed by Walter Hagen.
BACKGROUND
The owner is remodeling his residence and converted a standard wood
frame roof system to a scissor truss system.
The building inspection department of Orono desires a structural
engineering analysis of the system as constructed.
DESCRIPTION
The residence is a one story structure with slab on grade, masonry
exterior side walls , and wood frame roof system.
OBSERVATIONS AND COMMENTS
1. A site visit was conducted by John H. Dahlmeier of J. H.
Dahlmeier Engineering, Inc. on January 26, 1996.
2. Details of the truss as constructed were noted including
existing 2x4 roof rafter (8/12 pitch) and new 2x6 scissor
truss members ( 4/12 pitch) .
2305 Commerce Boulevard Mound, MN 55364 612-472-4746 Fax 612-472-6103
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3. Members are nailed together with 16 penny power gun nails.
At the intersection of the lower chord members, a block has
been installed between the two chords to tie them together
since they are not in adjacent planes.
4. A structural engineering analysis was completed by me using
design loads as required by the Minnesota State Building Code.
The analysis indicated that the truss members are adequate in
size. The connections between the members require 6 - 16 penny
power nails each connection between chord members except at
the ridge existing nailing is adequate. At the block member
6 nails are required from each side into the block member to
adequately transfer the load between the two bottom chords.
5. The owner was directed to complete this work in accordance with
this document.
6. The building inspection department of Orono was informed of
this information and will provide follow-up inspections as
required.
SUMMARY
7. Based on the above information, the scissors truss as constructed
with connections as noted is structurally adequate and meets the
design requirements of the Minnesota State Building Code.
If you have any questions, please contact me.
Sincerely,
John H. Dahlmeier, P.E.
Registration No. 9212
JHD:gs /
cc: City of Orono V
I hereby certify that this plan,
specification or report was prepared
by me or under my direct supervision
and that I am a duly registered
professional engineer under the laws
of the State of Minnesota.
nnesota Registration No. 9212