Reinforced concrete jackets are often used to strengthen a masonry structure.
Minimum concrete wall reinforcement.
F min 0 0025.
3 the distance between two adjacent vertical bars shall not exceed 3 times the wall thickness or 400 mm whichever is the lesser.
As a minimum 4 rebar 1 2 inch is spaced vertically at 36 inches on center continued to within 8 inches of the top of the wall placed on the tension side the inside face of the wall.
S size and spacing location of rebar relative to compressive face of.
Minimum cover requirements for nonprestressed cast in place concrete construction are given in table 20 6 1 3 1 of aci 318 14 building code requirements for structural concrete.
Y usually grade 60 60 000 psi yield strength amount of rebar a.
Minimum reinforcement for walls vertical reinforcement.
Prior to placing the jackets it s important to clean the mortar joints in between the bricks to make sure no debris disrupts the jacket s bonding.
Us reinforcing steel system when splicing a 5 reinforcing steel bar which has a diameter of 0 625 inches the minimum lapped splice length is.
Steel area minimum 0 20 0 40 of the concrete cross section area.
The jackets are placed on both or just one side of the wall after the plaster is removed from the wall.
Steel area minimum 0 40 of the concrete cross section area equally divided to each side of the wall.
40 x 0 625 inches 25 inches option 2 cut the vertical reinforcement steel bars for the lower storey so that they are flush with the top of that wall.
2 where the minimum area of reinforcement a s vmin controls in design half of this area should be located at each face.
The minimum ratio of required reinforcement is.
Strength of reinforced concrete sections what determines the strength of a reinforced concrete section 28 day compressive strength of concrete f c 3 500 or 4 000 psi minimum grade of rebar f.
F min 0 002 for f y 40 000 psi s min 0 0018 for f y 60 000 psi for walls.
Detailing of reinforcement is 456 guidelines.
F min 0 0015.
The cover required is 2 inches for foundation walls or walls exposed to weather and 1 1 2 inches for walls that aren t exposed.
Diameter minimum 1 4 diameter of the vertical reinforcement.
The temperature reinforcement shall not be less than inch at nine 9 inch center to center.
For plain concrete wall minimum vertical steel is 0 12 for hysd bars and 0 15 for mild steel bar.