Ugly, I guess that mechanical duct has to go somewhere!!!
Seems like the plate would transfer the force in the brace to the connecting members (each member would have an axial load and lateral point load due to the plate) as opposed to the centroid of the connection.
Does the unit sit on a continuous curb? If so, the load to the slab (bearing vs bending/shear) may be marginal with respect to the loading on the joists. If the slab were removed, would the unit and curb still rest on the joists? The opposite would occur if there was not a curb and the unit...
"Although my first concern was the allowable capacity of the existing floor joists, I am not wondering about the span of the floor slab between the joists." Is there a typo here???
"Is there any way to determine the capacity of this unreinforced floor?" Try Chapter 22: Structural Plain...
A few questions: 1. What is the ground snow and balanced snow height? 2. What is the depth of your new beam? 3. Can a shallower, heavier beam be used so that the beam depth is less than the balanced snow height?
Original Design, all wood members, 72’ roof span (6:12 slope): 20’ monoslope truss from brg wall to girder truss, 32’ gable truss girder to girder, 20’ monoslope truss from girder to brg wall. Girder truss designs have been verified and total span is 80’. The 72’x80’ area is clear spanned in...
I see the argument for the ‘valley’ theory. But a ‘valley’ is from a change in the horizontal plane that could potentially block blowing snow. I too ignore this condition. The sloped roof example used to eliminate drifting creates a change in the vertical plane. If the slope is too great...
To follow up with some of the questions: The existing beam is part of a frame built on top of a c.i.p. concrete roof. The 4 corners of the frame sit on stub columns centered on the existing concrete columns (the existing roof as not able to carry the mechanical unit and snow drifting). Shoring...
I’m looking for feedback on the analysis/common practices for reinforcing an existing W-flange beam. I’ reviewing an existing W-flange beam supporting some mechanical equipment. The owner wants to add equipment to the beam doubling the load on the existing beam and over stressing the beam. I...
In my office, we design stair stringers as a beam of depth equal to the depth of stringer remaining perp to the notch at the intersection of the tread and riser. If needed, the stringers could be doubled up if overall depth of the stringer is of concern.
Assumed loading aside, the problem of (4) 2X8's still exists. Have you considered using LVL material, which should have better allowable bending and deflection values than dimensional lumber? I'm not sure of the cost difference and it may also be more readily available in 20ft lengths than the...
