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	4 FAQ - Frequently Asked Question

	I often get backache and shoulder-ache out of the prolonged sitting, what should I do?
	In addition to selecting a well-designed chair, correct sitting posture is the most important thing. The figures below illustrate a healthy and correct sitting posture vs incorrect ones.


*Figure A* demonstrates the correct set up of chair height and position to place your b ody. You should sit all the way in until your lower back presses against the back rest of the chair. Your knees should be at 90° if you are using a computer keyboard most of the time. Shoulder-aches are usually caused by incorrect desk or work surface height.	*Figure B* shows the typical posture after sitting for a considerable time. This is because the human body requires movement. The back muscles start to get tense and your obdy will instinctively want to move in order to relax the affected muscles and enhance blood ciruclation. Subconsciously, we sit more like figure B - we move our body forward to relax the back muscles and put more upper body weight on the back rest. This posture may feel comfortable for a while but may cause a backache. This is because the body weight acting on the 4th & 5th vertebrae is harmful to hte vertebrae disc and sitting in this posture for a long period may results in a slipped-disc and lower backache.	*Figure C* is another incorrect sitting posture common in the production environment. Many people tend to sit at the front edge of the chair instead of occupying the whole seat area. They find it comfortable to tilt their upper body weight, it might results in shoulder-ache after prolonged sitting.

How to configure my own chair?

1. Requirement of a chair
Selecting the correct type of chair is very much dependent on the work requirement .If the chair required in a static sensitive production area, an ESD chair would be appropriate. Or if the chair is required in a cleanroom environment combined with electrostatic dissipative properties, a clean room ESD chair would be most suitable. On the other hand, for requirement in a normal production area, the choice would be a normal production chair.

2. Correct seat height
Choosing the correct seat height for the users is dependent on the desk height. Megatek offers 3 different strokes of gas lift to cater for your requirement. If your existing working table height is 30" high, then a low chair of seat height adjustable from 17" to 22" or a 5" stroke gas cylinder is most suitable. If you are using at a high bench, then a high chair of seat height adjustable from 21" to 29" or a 8" stroke gas cylinder is more appropriate. Standard seat height are tabulated on page 21.

3. Correct chair base
The chair base not only provides the support for the chair but also to the person sitting on it, not forgetting the dynamic movement of the person, for instance stretching, turning etc. Megatek features 2 types of base, aluminium and reinforced nylon, with 3 different sizes each. A diameter 23" or 24" chair base will provide sufficient support for a low chair and a diameter 26" chair base for high chair. Different types of application determines the type of chair base material. For instance, an ESD chair would have an aluminium chair base to acquire optimum static discharge properties and a normal chair ca n settle for a reinforced nylon chair base.

4. Caster or glide
Caster offer high maneuverability while glide offer high stability. Choice are much dependent on application too. For instance, a high chair with footring is recommended to have glide for stability as user's safety is concerned. Megatek offers a wide range of caster and glide, with or without static control properties.

5. Accessories
Megatek offers add on accessories like armrest, footring, drag chain etc. Armrests are recommended for computer related work like typing and footring is preferred for leg support under long hour sitting on a high chair. Drag chain is an option for a secondary static discharge path on ESD chairs.

What is the difference between an ordinary office chair and a production chair?

An ordinary office chair is normally used for only 8 hours a day. Some productionc hairs are used 24 hours a day on 3 rotating shifts and most of the time used by different people, very much unlike in the office.
Production chairs are for heavy duty usage. Therefore, the components used in our products have been thoroughly tested and proven reliable, dependable and durable. In our lines of production seating, all components used are tested and only the best are selected for our products. Our stringent quality control programme ensures that every chair shipped represents the highest of industry standards.

There are chairs that comes with back tilt features and synchronised mechanism for more comfort. Can a production chair have the same?

The answer is yes and no. Yes, it is ideal to have such features on a production chair, allowing workers to adjust the chairs to their individual preferences as wel las enable more body movements to minimise body-ache.
However, it is not advisable to have such features on a cleanroom chair. Such mechanical movements will result in metal to metal friction which will in turn generate particles. Unless the tilt mechanism is specifically designed for cleanroom application, this feature is not cleanroom compliant.