The exertional terms that the Social Security Administration use refer to your physical capacity for work, and are defined as follows:
Sedentary: Sedentary work means that you are able to sit for up to 6 hours in an 8 hour day, and lift up to 10 lbs. occasionally during a day
Light: Light work means that you can stand and walk for up to 6 hours in an 8 hour day, lift 10 lbs. frequently and 20 lbs. occasionally
Medium: Medium work means that you can stand and walk for up to 6 hours in an 8 hour day, lift 25 lbs. frequently and 50 lbs. occasionally
Examples of cases that considered the grid rules are available by clicking the link.
If you would like to speak to an attorney regarding the grid rules in order to determine whether you qualify, complete the contact form to be contacted for a free, no-hassle consultation.