Hazardous Building Assessment Criteria

If the house you live in is about 30 years old, we need to carefully determine whether it's a dilapidated building. Some houses, though not too old, may no longer be suitable for habitation due to various reasons and can be considered dilapidated as well. So, how do we make a proper assessment of dilapidated buildings? Today, our editor will discuss the methods of determining 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 story height and one side of a natural room.

2. Columns are sold by the piece, measured in one layer tall, one column per unit.

3. Beams, joists, rafters, etc., are measured by span or single piece.

4. Prefabricated panels are measured in blocks, cast panels in square meters of a natural room.

5. Rafters are sold per piece.

Section 2: Foundation, Basic Regulations.

If the foundation should slide, or if the bearing level is not reached due to other reasons, causing uneven settlement, then significant distortion, displacement, cracks, and tilting may occur, along with a tendency for further deterioration.

2. Soil foundation adjacent to buildings increases the load due to superstructure, or due to its own partial expansion, leading to settlement caused by other human factors. This then results in significant distortion, displacement, cracking, and tilting in the house structure, with an ongoing deterioration trend.

3. Basic aging, corrosion, and fracturing, etc., have led to significant distortions, displacements, cracks, and tilts in the house structure, with a tendency for further deterioration.

Other standards for dangerous building identification

Section 1: Wall Column Specifications.

1. Cracks in the wall columns or the protective layer have fallen off. The primary issue is the exposed steel reinforcement, or the presence of significant horizontal cracks, crushes, etc.

2. Significant interlaced cracks appear at the center of the wall, or accompanied by the falling off of the protective layer.

3. Columns and walls are bowed, with the degree of bow exceeding 1/100 of the height.

4. Columns and walls with concrete spalling, carbonation, and bulging; the damaged area exceeds 1/3 of the total area, with the main reinforcement exposed, severe rusting, and reduced cross-section.

Section 2: Beam Specifications.

1. Single girder or central part of the continuous girder shows transverse cracking, possibly extending upwards to more than 3/2 of the girder height with 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.

3. The frame beam shows 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 perimeter of the troweling board or interlaced cracks on the bottom.

6. 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 steel bars exposed, severely rusted, and cross-sectional reduction.

8. Pre-stressed prefabricated panels exhibit vertical through cracks; or the concrete at the ends is loose, exposing steel bars, with a length exceeding 100% of the main steel bars.