BEAM ON TOP OF A WALL
BEAM ON TOP OF A WALL
(OP)
Hi friends, I'm new here but I'm glad to be here,
i was just asking how do you design a reinforced concrete beam on top of a wall ( or supported by a wall ) throughout it's length and it's supporting a concrete slab? what do i check? thanks friends.
i was just asking how do you design a reinforced concrete beam on top of a wall ( or supported by a wall ) throughout it's length and it's supporting a concrete slab? what do i check? thanks friends.






RE: BEAM ON TOP OF A WALL
Tie-Beams like these were a big betterment of wood inclusions, since fitting to the rest of the building was much better, and so the likelihood of the overall structure losing the wanted geometry that ensures some known (or purportedly known) load path was diminished. In that role, included beams didn't need much reinforcement, say from 2 to 4 #3 or #4, you can see it in the masonry codes of the seventies' even.
Then, going upwards in height, we started to get cases of masonry walls unloading (sometimes through concrete creep, or just inability to sustain the loads) in the lower beams included in the floors. A pathology appeared with diagonal cracks from the bottom corners of masonry panels ... secondary equilibrium was attained with the included beams working as ties, but too late, you had the cracks already in façades. So corrective measures were introduced, first cut the number of stories that may unload on some façade beam. Usually this is done every 3 stories a horizontal joint (of course not forgetting to include as much fittings as needed to ensure stability of whatever built, say, under earthquake or wind). Second, calculate your included beam for the potential effects -imbued deformation- such unloading scheme may produce. One can go over conservative here but normally if the number of stories that may unload (load) the included beam is small, not much reinforcement results even if you count all the stories between joints loading in the lower beam. In the process, ensure that the limits of deflection for RC members as per the code are respected, long term included.
RE: BEAM ON TOP OF A WALL
RE: BEAM ON TOP OF A WALL
but i want to know the procedure if im designing manually for example
1. i calculate the load on the beam
2. how do i decide on the size of the beam do i look at the openings only or what?
3. do i calculate bending moment considering the openings or how
4. calculate for shear and design
if you help me with this procedure i will be thankful assuming the building is a two storey building. ok i have to design a beam of 8m resting entirely on the wall with 2.4m opening in the middle part how do i do it, it simply carries 6 timber trusses each with a reaction of 10KN.
RE: BEAM ON TOP OF A WALL
RE: BEAM ON TOP OF A WALL
If the fixity allows for it, maybe considering the beam fixed will be both more accurate and economical, and you may select the minimum depth according to the fixity conditions for the span.
Design of flexural and shear reinforcement is just to follow the reinforced concrete code, usually no particulars arise.
That just the outline, try to examine examples in masonry design manuals.
Models following my other entry if carefully built may produce better results and some appraisal of the effects of the deformation at the foundations, plus better assessment of the solicitations in the included beams and maybe the masonry panels.
RE: BEAM ON TOP OF A WALL
RE: BEAM ON TOP OF A WALL
RE: BEAM ON TOP OF A WALL