Temporary Shoring for Brick Masonry Facade
Temporary Shoring for Brick Masonry Facade
(OP)
Hello all. I'm working on a 4 story brownstone renovation project where the architect wants to open up the lowest level of the rear facade (leading out to the rear garden). I have designed steel moment frame to support the wall above and resist lateral forces. The contractor has now hired us to design the means and methods to carry out the work. The facade is 16' wide and consists of 3 wythes of brick. The rough opening will be 13' (finished opening is 11' after the moment frame is installed). I'm suggesting clamping the wall just above the proposed opening using two stiff MC's with through bolts. The channels would be supported by perpendicular beams through the windows (rather than needle through the brick piers). I'm at a loss as to what capacity to assume for the bolts. Should I specify a torque to develop a clamping capacity? Can anyone provide some guidance?






RE: Temporary Shoring for Brick Masonry Facade
Dik
RE: Temporary Shoring for Brick Masonry Facade
RE: Temporary Shoring for Brick Masonry Facade
RE: Temporary Shoring for Brick Masonry Facade
Dik
RE: Temporary Shoring for Brick Masonry Facade
One thing we've done is to attached a series of small clip angles - perhaps 3x3x1/4 on the back side of the channels and then sawcut out (in the mortar joints) slots to receive these angle legs, which serve as ledges for the brick - at least the two outer wythes. The inner wythe is presumed to be adequately interlocked to the outer wythes so that no vertical support is necessary. You might loose a little brick from the inner wythe right at the opening though. The through bolts would still be used - but more to stabilize the channels and less to carry the brick as the clip angles would do that.
This way, once removed, you have fewer holes in the brick and only mortar-repointing to do to "heal" the facade.
RE: Temporary Shoring for Brick Masonry Facade
With all that said, I'm in two minds about whether to use this scheme over simply using needle beams..... There isn't much wall to work with between the windows.
RE: Temporary Shoring for Brick Masonry Facade
Let the angle clips do the work.
RE: Temporary Shoring for Brick Masonry Facade