1。 Remove the wall between the room and the balcony.
Demolition of the wall between the balcony and the room, refer to the removal of the window wall (the wall between the door and the window). The window, door and window side wall under the wall mainly bear the vertical load and horizontal seismic force in the structure. After the wall was demolished, a doorway was formed between the balcony and the room, which changed the original working state and structural performance and caused great damage.
2, remove the bearing wall, open the door on the bearing wall, open the window, thin bearing wall.
Load-bearing wall generally refers to the wall, joist, beam, truss or roof panel on the floor, which not only bears the live load and static load of the upper floor, beam and truss, but also bears the self-weight layer above, and transfers these loads to the lower wall to the foundation.
Tear down the bearing wall and put it on the bearing wall? Opening the door, opening the window and thinning the bearing wall will not only directly damage and weaken the bearing capacity of the bearing wall, but also damage the integrity and impact resistance of the house.
The destruction of the wall will produce harmful vibration, and it will also lead to the looseness of the adjacent wall. The strength and bearing capacity of the wall are reduced, and the upper and lower walls and floors are damaged, resulting in structural damage.
3. increase the static load of floors and balconies at will
Some residents laid granite or marble slabs on the floor when decorating their houses, and built an enlarged whirlpool on the bathroom floor. Floor heating equipment, balcony masonry wall, etc. The static load is obviously increased, which makes the floor in an overloaded state and seriously endangers the safe use of the house.
The bathroom floor is generally designed as a reinforced concrete slab in terms of function. The live load standard of the floor is 2.0KN/m2, which can be freely placed in the bathroom to expand the surfing bathtub. And the weight has increased by several hundred to one thousand kilograms, and the load has increased by several thousand kilograms.
The increased load in the above two cases will often lead to the deflection, cracking and leakage of the floor, which will affect the safe use of the structure.
Other families put heavy objects on brick walls or balcony railings of renovated houses. Because the balcony is a cantilever structure, it is the most unfavorable structural form under stress. When the concentrated load 1kg increases, the internal force of bending moment force is four times that of two-point structure. Usually, the cross-sectional area and reinforcement amount of the root of balcony beam or cantilever slab are designed according to the static load and normal service load of balcony slab. Residents build brick walls and place heavy objects on the balcony, which is beyond the normal state of the balcony. The bearing force causes the root of balcony cantilever beam or cantilever plate to break, which may cause the balcony to fall over and collapse.
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