Re: work being done at hse-1996 - Laserfiche WebLink

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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