STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
(OP)
I AM WORKING ON A DESIGN WHEREBY THE ARCHITECT IS REMOVING 18' OF INTERIOR BEARING WALL AND REPLACING IT WITH A STEEL BEAM. SUPPORTING 2ND FLOOR AND CEILING FRAMING. THE ARCHITECT WOULD LIKE TO USE A TS4X4 (APPROX. 16' TO BASEMENT FOOTING). A SIMPLY CONNECTED BEAM SITTING ON TOP OF A POST CAP PL IS BY ITSELF UNSTABLE. I WOULD HAVE TO RELY ON THE HOUSE FRAME STABILITY FOR STABILIZING THIS SIMPLE FRAME. IS IT APPROPRIATE TO USE 2% OF THE POST LOAD AS THE FORCE REQUIRED TO BRACE FOR STABILITY IN 2 DIRECTIONS?? WOULD IT BE MORE APPROPRIATE TO CONSTRUCT A MOMENT FRAME OR WOULD THAT BE TOO CONSERVATIVE.






RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
you have not given enough information to give a complete answer but it sounds like you need an experienced structural engineer.
The answer depends on if the 18' of wall is required for stability. If it is then you need to also consider deflection of the frame under the lateral loads.It is common practice here to use a picture frame (4 sided frame) in these situations.
RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
thanks
RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
If the house is stable, your frame likely to be stable if tied to the floors.
RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING
I assume from you post that the TS 4X4 is the end column, not the beam. If it is the beam, it probably will not work considering deflection limitations.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: STEEL PORTAL FRAME STABILITY IN RESIDENTIAL FRAMING