If a claimant is unable to sustain work activities in an ordinary work setting on
a regular and continuing basis, explain why the claimant is not capable of sustaining
a 40-hour workweek.
In most cases, the exertional and nonexertional limitations resulting from an MDI
can be described using the functions listed in the check boxes on the RFC. (For completion
of the RFC form, see DI 24510.050, DI 24510.061, and DI 24510.063 through DI 24510.065.) If the claimant is not capable of sustaining a 40-hour workweek, the check boxes
should reflect the conclusions reached in the narrative portion of the RFC.
In other cases, the claimant may have limitations that prevent him or her from sustaining
a 40-hour workweek which cannot be described using the functions listed in the RFC
checkboxes. In these rare instances, it may not be possible to complete all of the
check boxes. The adjudicator should explain in the narrative how the claimant’s MDI(s)
prevents him or her from sustaining a 40-hour workweek.