HomeMy WebLinkAboutRe: remodel � DESIGN
STRUCTURAL ENGINEERING
1409 S. 7th St. HOPKINS, MN 55343
935-5550 20�4 06 1�
Jae & Sandv R.auschendorfer
�895 Shoreline Drive
Orono_ Minnesota 55391
Att: Sandy Rauschendorfer 952-471-9230 w:952-472-6882
Re: Residence Remodel Str-uctural !�natysis for Bsmt. Beam { V4'R# 298-2}
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As requested, we met yesterday at your home. We observed the new triple 13" Larninated tieneer
Lumber (LvL)beam in the living room, spanning 16' supportirzg the upper level bedroom & a
portion of the roof, as weIl as tY�e large beams installed in a 1930 remodel. The major concern u�as
the relocated column load on the Masement beam. We measured the structural members & floor
areas for later analysis, as welt as discussed likely constructi�n requirements.
�H�LYSIS
Using code prescribed live loads of 40 pounds per square foot (psfl and observable dead loads we
performed a structural analysis of the loading line 8 feet in frotn the South side of the house ( where
the stacked LvL's were installed}. The new triple 13" LvL can safely support superimposed loads,
being stressed to 82°ro of capacity� and a mazunum live load defl�etion ratio of span divided by 350
(= La'350). A historical live load deflection ratio of LJ3601imits plaster cracking. This remodel onl_y
slightly exceeds this limit. The e�stin�Basement Beam consisted of 8 laminations af 1 3/4"x 16"
LvL. The 8-16"LvL beam can safely support superimposed loads, bzing stressed to 75°ro of capacity
and a ma�mum live load deflection rario of L�350. Continuing the vertical load path: the center
basement column is stressed to less than(an acceptable) 30(}psi; and the center footing is loadi� the
soil with 3300 psf(no different than before the latest remodel}.
��a��n��to�xs
The new triple LvL Living room beaxn must have the end bearing areas rebuilt with the exclusion of
flat lumber ( plates & plywood} from LvL beam to Basement LvL Beam. Shore the beam one end
at a time, remove minimal amount of plate and floor, install bearing siuds, block adjacent to bearing
studs {under king studs) thru floor thickness. The East�all with 3- 2x4 (SPF#1+2) direct bearing
studs, w�th 2x4 king stud each side is adequate to suppart the load. The W est wall with 2- 2�6
(SPF#I+2) direct bearing studs is adequate to support the load. Solid block 3-2x6 thru floor over
Basement beam. The e�istin� southern 8 foot living room eatension ceiling has a few butt spliced
2x8 joist. These must be doubled with new lumber.
�%e believe this should address vour immediate needs. If you have any additional concerns, or
questions on our , please call to discuss them. Thank you for the opportunih�to assist you .
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S' cerely `� �``�
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t�'arren T�r. Rutledge Y.E. �`��r�3e
�'R Design Structural Engineering
1409 South Seventh Street
Hopl:ins, Mimiesota 55343-7894
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