Besides the NIOSH equation are the Snoock and Ciriello tables to transfer loads and institute safety and health of Spain has too

ISO 11228

For standing work I recomend you reading articles written by Sthephan Konz and related to lifting, carrying, pushing ....tasks ..you can find information in ISO 11228 part 1,2 and 3. 

Maybe this Directive by the Council of the European Communities, can be useful for you.

http://eur-lex.europa.eu/eli/dir/1990/269/2007-06-27

You have to select tne language in html or pdf

There are technically a whole range of different ergonomics tools u can use. Those mentioned in the above is a good start for you to look into - Revised NIOSH Lifting Equation (RNLE) (ISO 11228 - Manual Handling activity), the Snook Table. You may also want to explore around other methods such as MAC from HSE UK. 

However, looking at your specific requirement (or is that examples?) - height, radius or suitable weight for lifting, you definitely would benefit more from using RNLE. You can play around with the vertical and horizontal distance of lift, weight, etc.

To get a quick or rapid idea to assess the manual handling activity, you can refer to HSE UK manual handling guidelines as it provide a simple figure of reference summarizing the different limit of weight for lifting in different zone of height.

However, bear in mind that there are limitation in using these tools. Observe the assumption and requirement when using the assessment tools. Among some other consideration you may want to includes are the physiques and experience of the employee (generally, Malaysian population are physically smaller in size).

FYI, Human Factors and Ergonomics Society is in the progress of drafting Guidelines of Manual Handling Activities and Guidelines of Ergonomics Risk Assessment under Department of Occupational Safety and Health.

Dear Muhamad Shahril Zakariah

For head load carrying, 30% of body weight is considered. Above mentioned equations also provide guidelines. Moreover, if object is voluminous, then another criteria may be   needed.  As per your need, you can device the methodologies based on literature. 

Dear Muhamad Shahril Zakariah,

In the Netherlands, we recently developed the following guideline entitled 'An Evidence-Based Multidisciplinary Practice Guideline to Reduce the Workload due to Lifting for Preventing Work-Related Low Back Pain.

The guideline includes the above mentioned NIOSH and MAC and in addition provides an overview of effective and ineffective interventions.

The guideline is freely availabe at (and of course in English): https://aoemj.biomedcentral.com/articles/10.1186/2052-4374-26-16.

The guideline is also attached.

Hopefully it is of use.

Good luck with your work!

Kind regards,

Paul Kuijer

Dear Muhamad Shahril Zakariah,

The following ISO Standards could provide guidance.

ISO 11228-1:2003 Ergonomics -- Manual handling -- Part 1: Lifting and carrying

ISO 11228-2:2007 Ergonomics -- Manual handling -- Part 2: Pushing and pulling

ISO 11228-3:2007 Ergonomics -- Manual handling -- Part 3: Handling of low loads at high frequency

Also, the GUIDELINES FOR MANUAL HANDLING (link provided), published by WorkSafeNB addresses many of the issues you mentioned.

Hoping this will help.

Roland

standards for standing is as closed as cg  keep spine as straight as possible while lifting, do not carry more than 1/3 rd of your own body weight these are practical standards used in shop floor. pcg ,chennai

Dear Muhamad,

If you want to determine a weight limit to lift under specific working conditions, you should use the Revised NIOSH Lifting Equation (RNLE) (downloaded from http://www.cdc.gov/niosh/docs/94-110/pdfs/94-110.pdf) as referenced in the international standard ISO 11228-1.

But you should also take into account some updates that have been made in the equation in recent years. Especially those related to analyzing variable lifting conditions (several weights from-to different locations). The Variable Lifting Index (VLI) has been defined for these cases.

You can read about VLI in ISO TR 12295 and in this paper which is free to download: http://hfs.sagepub.com/content/early/2015/11/25/0018720815612256.full 

I hope you find this information useful.

Best regards, 

Enrique

You might take a look at:

https://www.crcpress.com/Fitting-The-Task-To-The-Human-Fifth-Edition-A-Textbook-Of-Occupational/Grandjean-Kroemer/p/book/9781482263046

or

http://www.baua.de/cae/servlet/contentblob/916390/publicationFile/59225/F2116-2.pdf

or

https://www.buchhandel.de/buch/Handbuch-der-Ergonomie-Handbuch-der-Ergonomie-HdE--9783927038707

or

https://www.amazon.de/Occupational-Ergonomics-Handbook-Waldemar-Karwowski/dp/0849326419

These are standard books. Your university library might have them or might be able to somehow get them for you.

In general, these studies are always limited, since the boundary condidtions might vary and also the population of test subjects. Whatever you do, you need to carefully look into the assumptions of the study you are using. Hope this helps.

You can find some information and references here:

http://www.sciencedirect.com/science/article/pii/S0925753514000423

Kindly suggest literature or Book related to the problems faced by workers while lifting loads on head