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Date & Time in Bali

CURRENT LOCAL DATE AND TIME IN BALI:

Monday, 19th April 2021
9:45:22 am

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Why is stability of a wooden prefab structure so important


Horizontal stability of a wooden prefab structure (thus also prefab houses) is always a main issue. Due to the fact that timber inter-connections do not fit exactly (like steel connections do), the structure is extremely sensitive for horizontal movements (displacements). It is not so difficult to horizontally move a wooden framework by hand, unless proper bracings are provided. 

While earthquakes are of minor concern for a wooden house due to flexibility of the wooden structure, the same flexibility is of major concern when a hurricane or a cyclone strikes. The inter-connecting timber parts shall not only be strong enough to absorb the immensely high wind loads, the stability of the house is most important. The high wind pressure loads can easily be absorbed by the tropical hardwoods that we use, however the strength of a wood species does not contribute at all to overall stability. To accomplish this, additional and sometimes far-reaching measures need to be taken (which unfortunately has a negative impact on the price of the house). The second area of concern is the roof structure. Most people believe that it is the wind pressure which may disintegrate a roof. This is a misconception. It is the wind suction which does the major damage. Our engineers have a vast experience in dealing with these problems and know how to solve this.

All wooden prefab structures are normally subject to significant shrinkage and expansion caused by temperature and hunidity changes, which are far higher than those experienced for prefabricated concrete structures and prefabricated steel structures. The shrinkages and expansions in wood may have a significant impact on the connections, whether this is done with bolts or screws. These constant shrinkages and expansions will  cause "slackening" of the connections, whereas unexpected and dangerous connection instabilities will occur, which may induce sudden collapses. Modern engineering techniques have been developed and codes been issued over the last decade which take such "slackening" phenomena into account. The codes provide formulae and design advice to cope with these aspects, arriving at safe connections which will remain safe over time. Our engineers are very well familiar with these codes and will properly apply them.       


CONCLUSION:
Relying on only the strength of the materials is not sufficient. An proper analysis on the overall stability and the connections shall equally be carried out.  

 

Reviews from Bali Prefab World

"I would like to take this opportunity to thank Prefabworld Bali International for its professionalism. Working with them on my San Andres project made it a breeze. They provided me with a design that was exactly what I had envisioned. Not only were the drawings perfect, they also produced them in a timely manner which is imperative when working on projects overseas. I highly recommend Prefabworld Bali International to colleagues always. I look forward to working with them on future projects".
Review from: Ms. Ghada Dergham, Florida, USA
Project: Design of three 2-storey units for a small resort on the island of San Andres , Caribbean
Date: 15-02-2013
Rating: 5 out of 5

Read more testimonials from Prefabworld Bali International: click here
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