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Showing posts with label Architects. Show all posts
Showing posts with label Architects. Show all posts

Thursday 11 February 2016

Developers of toppled Taiwan building detained

Executives face charges over professional negligence resulting in death




Questions are being asked about the building’s construction (Picture: AP)

Three Taiwanese construction company executives have been detained on charges of professional negligence resulting in death following the collapse of an apartment building in an earthquake, killing dozens.

The district prosecutor's office in the city of Tainan said Wednesday that Lin Ming-hui and architects Chang Kui-an and Cheng Chin-kui were suspected of having overseen shoddy construction of the 17-story Weiguan Golden Dragon building, which crashed onto its side during the earthquake Saturday.

It said the three were detained to prevent collusion or other acts that could disrupt the investigation. Among the accusations was that only half as many fasteners had been used in the supporting columns as required.

The death toll in the 6.4-magnitude quake stood at 44 on Wednesday, with all but two of the deaths coming in the building collapse. About 100 people are believed to still be trapped in the debris.

The broadcaster FTV and other Taiwanese media said Lin had changed his name after a previous bankruptcy and had run multiple property development companies in Tainan in an apparent attempt to avoid creditors and bilked clients.

Although the shallow quake was potentially devastating, few buildings were damaged as a result of strict construction standards in force in Taiwan, an island frequently struck by quakes. The Weiguan Golden Dragon building, built in 1989, was the only major structure to collapse in the temblor.

Most of the 320 people who were rescued from the disaster were saved in the hours immediately after the quake, in which the building's foundation and lower floors gave way before it toppled onto its side.

Earthquakes rattle Taiwan frequently. Most are minor and cause little or no damage, but a magnitude-7.6 quake in central Taiwan in 1999 killed more than 2,300 people. More stringent building standards were introduced following that disaster and appear to have been tightly enforced.

The quake struck during the most important family holiday in the Chinese calendar - the Lunar New Year. Celebrations of the holiday in Taiwan have been subdued. - AP

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Sunday 12 April 2015

Building structural integrity & failure: problems, inspections, damages, defects, testing, diagnosis, repair

Structural integrity and failure is an aspect of engineering which deals with the ability of a structure to support a designed load (weight, force, etc...) without breaking, tearing apart, or collapsing, and includes the study of breakage that has previously occurred in order to prevent failures in future designs.

Structural integrity is the term used for the performance characteristic applied to a component, a single structure, or a structure consisting of different components. Structural integrity is the ability of an item to hold together under a load, including its own weight, resisting breakage or bending. It assures that the construction will perform its designed function, during reasonable use, for as long as the designed life of the structure. Items are constructed with structural integrity to ensure that catastrophic failure does not occur, which can result in injuries, severe damage, death, or monetary losses.

Structural failure refers to the loss of structural integrity, which is the loss of the load-carrying capacity of a component or member within a structure, or of the structure itself. Structural failure is initiated when the material is stressed beyond its strength limit, thus causing fracture or excessive deformations. In a well-designed system, a localized failure should not cause immediate or even progressive collapse of the entire structure. Ultimate failure strength is one of the limit states that must be accounted for in structural engineering and structural design.

These articles explain the inspection, detection, diagnosis, and repair of all types of structural defects on residential and light commercial buildings and will answer most homeowner concerns. We address brick and other masonry structures, wood frame structures, log homes, modular and factory built homes, even mobile homes.

Chimneys, crawl spaces, decks, building flood damage, foundation crack and movement damage, rot or insect damage, sink holes, and water entry are examples of topics for which InspectAPedia provides inspection, diagnosis, and repair advice. Our page top photo illustrates Story Land[26] a remarkably askew wood-framed structure that would have been quite challenging to frame.

Guide to Detecting & Evaluating Structural Defects: Inspection, Diagnosis, & Repair of Settlement, Improper Construction, Rot & Insect Damage to Buildings


Articles found in this section address just about all types of residential & light commercial building structural construction, inspection, diagnosis & repair topics such as foundation damage, leaning, buckling, bowing, and cracking, FRT plywood failures, chimney inspections & safety concerns, causes and cures for rot, mold, & termites in buildings, sinkholes at building sites, stair and rail fall & trip hazards, & also special inspection methods for mobile homes.

Most structural problems can be avoided by proper design and planning; but structural failures have been common for a long time, and sometimes are costly to handle properly.

The sketch at left( courtesy Carson Dunlop) names the major structural components of a typical wood frame house set on a masonry foundation.

Structural Defect Recognition, Repair, Prevention for Building Structures, & Building Structural Failures

This photo of the leaning tower of Pisa was sent to us by our friend Tom Smith who knows a crooked building when he sees one. Smith points out that the problems with the Tower have been known for generations and must have been apparent even during construction, as the upper level was constructed with an offset to try to re-balance the structure.
Modern reinforcement has permitted removal of cables that used to be tied to the tower of Pisa. As Bernie Campbalik says about old buildings, "Yep, we had guys like that back then too."
Metal chimney during installation (C) D Friedman
Pier construction, Northern Maine (C) D Friedman

 

Framing & Wood Beams / Timbers Damage Inspection, Diagnosis, Testing, Repair

Photograph of  severe roof structure damage from an unattended roof valley leak in a historic home.
Collapsing barn (C) Daniel Friedman

Rot, fungus, Termites, Carpenter Ants, Powder Post Beetles, & other Wood Destroying Organisms

Buckled siding at ground level indicates sill crushing (C) Daniel FriedmanOur photo (left) illustrates a combination of factors leading to a strong indication of serious structural damage at a home: aluminum siding at ground level (risk of insect attack) combined with buckled siding at the bottom course (a condition that only occurs long after original construction) point to crushed wooden sills under this structure, most often due to insect attack or rot or both.
  • INSECT INFESTATION / DAMAGE - complete guide to wood destroying insect inspection, diagnosis, evaluation, repair, and prevention at buildings
  • The Sick House/Sick Building Information Website Organized, un-biased, in-depth advice about mold, allergens, and other indoor contaminants: finding, testing, cleaning, clearance testing, and preventing mold, mildew, wood destroying (rot) molds (fungi). Explains how to assure that testing for toxic or allergenic molds is performed using valid field and lab methods. Advice and test procedures are provided for odors and odor source detection, toxic gas testing and gas source identification.
  • "House Eating Fungus" Meruliporia incrassata (also called "Poria" the house eating fungus) in the U.S. or Serpula lacrymans in Europe) can cause severe structural damage. Evidence of hidden "poria" may be found by expert inspection methods which include tracing sources and paths of probable Building leaks and moisture traps. Further, careful indoor particle sampling methods can often permit the presence of this mold to be identified in the laboratory.
  • WOOD DESTROYING INSECTS carpenter ants, powder post beetles, & other wood destroying organisms

Continue reading at BRICK FOUNDATIONS & WALLS or select a topic from the More Reading links shown below.

Suggested citation for this web page

STRUCTURAL INSPECTIONS & DEFECTS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

More Reading

Green link shows where you are in this article series.
 By InspectAPedia®

Structural Integrity and failure:
http://en.wikipedia.org/wiki/Structural_integrity_and_failure

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