Hazardous Building Assessment Criteria
If your home is around 30 years old, it's important to carefully determine whether it's a dilapidated building. Some houses may not be very old, but due to various reasons, they are no longer suitable for habitation. Such houses can also be considered dilapidated. So, how do we determine if a building is dilapidated? Today, our editor will discuss the methods for identifying dilapidated buildings, ensuring we all have a safe and cozy home.
I. Basic Standards. The independent column foundation is measured by the individual basic unit of a single column; the strip foundation is measured by the single face length of a natural room; the full room foundation is measured by the area of a single natural room.
1. Walls are measured by one course high and one natural room side.
2. Columns are measured by height in one layer, with each column as a unit.
3. Beams, joists, rafters, etc., are priced by span and piece.
4. Prefabricated panels are measured by pieces, cast panels by the area of a natural room.
5. Trusses are sold per piece.
Section II: Foundation, Basic Standards.
1. If the foundation is to slip, or if the bearing level is not reached due to other reasons causing uneven settlement, it may result in significant distortion, displacement, cracking, or tilting of the structure, with an ongoing deterioration trend.
2. Ground foundation loads increase due to adjacent buildings, or due to the addition of floors within the structure itself, as well as other human factors causing settlement. This then leads to significant distortion, displacement, cracking, tilting, and other conditions in the house structure, with a tendency for further deterioration.
3. Basic conditions such as aging, corrosion, and breakage have caused significant distortion, displacement, cracks, and warping in the house structure, and there is a tendency for further deterioration.
Other standards for unsafe building assessment
Section 1: Wall Column Specifications.
1. Cracks in the wall columns or the protective layer peeling off. The primary issue is exposed rebar, or the presence of significant horizontal cracks, crush, etc.
2. Significant interlaced cracks appear at the center of the wall, or accompanied by the shedding of the protective layer.
3. Columns and walls are warped, with the degree of warp exceeding 1/100 of their height.
4. Columns and walls exhibit concrete spalling, carbonation, and bulging, with the damaged area exceeding 1/3 of the total surface area. Additionally, the main reinforcement is exposed, severely corroded, and the cross-section has been reduced.
Section 2: Beam Specifications.
1. Single girder or the central part of a continuous girder may exhibit transverse cracking, either extending upwards to more than 3/2 of the girder's height with the protective layer falling off, accompanied by vertical cracks below.
2. Significant diagonal cracks appear at the ends of simply supported beams and continuous beams, and significant vertical or diagonal cracks appear at the root of the cantilever beam.
3. The frame beam exhibits significant vertical or diagonal cracks at the fixed end, or interlaced cracks appear.
4. Significant vertical cracks have appeared beneath the prefabricated panels.
5. Cracks appear around the edges on the tamping plate or interlaced cracks below.
6. Various beams and plates exhibit deflection exceeding 1/150 of their span, and cracks in the tension zone are wider than 1mm.
7. Various board protective layers have fallen off, with over half of the main reinforcement exposed, severely corroded, and cross-sectional reduction.
8. Vertical through cracks appear in prestressed prefabricated slabs; or the concrete at the ends is loose, exposing steel reinforcement, with a length exceeding 100% of the main reinforcement.
