HomeMy WebLinkAboutRe: work being done at hse-1996 r �• /(�� `���, ' ���
50 highland avenue excelsior, minnesota 55331 �
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�h�z, 1�6 � . kilstofte
� associates
� architects
Mr. Bart Roeglin te1.612•470•o8os
Bart Roeglin Bu�ding&Remodeling icwin h.kilstotte
2260 Westedge Boulevard president
Mound,Minnesota 55364
Subject: Holcombe House
Reinforcing of Existing Wood Beam Near Dining�Area
Dear Bart,
Since the decision by Doug Holcombe to leave the dining room as is and not expand it, the steel
beam shown m our plans w�l not be required. We are assuming that the existing wood beam is a
6"x 12" timber, and the addition of the�w column reduces its span from 20' to two spans, one
of'7' and one of 13'. With the reduced span this beam is st�l inadequate a�d w�l require one ply
of gang lam 1 3/4 z 11 1/4 glued and nailed to one side.
If it is found that this beam is a 4"x 12" and not a 6"x 12", add one m�re gang lam of the same
size. Gang lam's should have an Fb of 3100 P.S.I. �
If you aze going to use a steel adjust-a post in lieu of a standard 3" steel pipe column at the new
column location,the adjust-a post must have a capacity of 10 kips.
We have checked the existing W 10 x 68 beam at the first�oor and it has adequate capacity f�r .
this change. � � .
Sincerely yours, _
I�LLSTOFTE ASSOCIATES,INC.
�`•�
H. K�7stofte
�
cc: Doug Holcombe
R
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50 highland avenue excelsior, minnesota 55331
-
. , � I�
. February 26, 1996
kilstofte
associates
�. Bart Roeglin architects
Bart Roeglin Building&Remodeling . ts�. 6t 2•a�o•osos
2260 Westedge Boulevard trwtn t,.kilstofte
� Mound, Miimesota 55364 president
Subject: Holcombe House �
Existing Flat Roof Over Garage
Dear Bart,
Existing 2"x 8" framing at 16" o.c., Fb 1200, spatuiing approximately 12' will hold 54#/s.f. total
load at L/360 deflection. Allowing for live load of 40#/s.f. and dead load of 10#/s.f. leaves excess
capacity of 4#/s.f.
The cerrter beam at the garage, 5 1/2" x 13" or 6" x 14" nominal at a span of 21.33' will carry
onty 294#Ilin.ft. at a deflection of L/360. The total load of 50#/s.f. at 12' span results in a total
load of 600#/lin.ft. The excess load of 306#/lin.ft. can be supported by the addition of two gang-
lam beams 1 3/4" x 14" glued and nailed on both sides of the presetrt beam. The total load
capacity of these beams is 384#/lin.ft. added to the 294#/lin.ft. carried by the original beam
making a total capacity of 778#/lin.ft,, or 178#/liu.ft. excess capacity. Live load deflection at
L/360 is 480#/lin.ft. The capacity of the three members together is 550#/lin.ft. at L/360.
Additional studs must be added under the beams at bearing. The gang lam beams by Structural
Wood Corporation used in calculations, have an Fb of 3100 P.S.I. and an"E"of 2.0.
The beam in the garage at the east wall nearest the dining room has only�about 2/3 of the load of
the center beam. I think it would be a good idea to add one 1 3/4" x 14" gang-lam glued and
nailed to this beam This would preverrt atry additional load to be transfen�ed to the first floor
structure through the stud wall below it.
Yours truly, • •
KILSTOFTE ASSOCIATES, INC.
, I ofte . . .
cc: Doug Holcombe