Help: conditionals with date/time. E.g., Need duration only if time falls in M-F 6am-5pm.

Hello all! I'm trying to calculate the outage duration for when a website is down. We need to know, of the total outage duration, which hours fall into "PEAK hours" and which hours fall within "NON-PEAK Hours" criteria range.
Spreadsheet attached. See the sheet "Testing" in this file.

In the example, sheet "Testing" row 2
The outcome should be

Total duration hours for peak and non-peak time frames
PEAK (duration) 2:00
NON-PEAK (duration) 13:00
15:00 <--Grand total of entire duration

The example uses the following start and stop times:
Start of outage | End of outage
9/27/16 16:00 | 9/28/16 7:00


Cell B9 is 2 hours, because within the total outage duration, 1 hour falls within the "PEAK" range criteria (9/27 4pm - 5pm), and on the 2nd day 9/28, another hour also falls within the PEAK criteria, (6am - 7am) for a total of a 2 hour duration for the PEAK category.
Cell B10 is 13 hours because the remainder of the outage hours fall within the NON-PEAK criteria
However, if 9/28/16 was a holiday, then that 2nd hour from 6am-7am would have to be counted in NON-PEAK hours instead of PEAK hours (so, the new totals would be 1 hour peak, 14 hours non-peak).

Category criteria
PEAK HOURS = M-F 6am - 5pm
NON-PEAK HOURS = all other hours/days (5pm and on for M-F) and weekends (sat & sun) and any holidays (which I will list in a column)

Any help MUCH appreciated, I've been quite stuck for a while and keep trying various options and researching....I've looked into several functions (e.g., TIME, TEXT, WORKDAY, etc)
If the outage range did not span days, and were only within 1 day (start date and stop date were the same), then this would work: =MIN(D6,TIME(17,0,0))-MAX(C6,TIME(6,0,0)) to calculate PEAK category, but since outages can span days, this doesn't work.
I think I need a conditional formula that says to give the duration based on the PEAK and NONPEAK criteria.

File attached here.

Looked at the Google Sheets file and not saying that I can provide a solution, however I can tell you how to upload an Excel spreadsheet/workbook to this site so that it can be worked on, as there isn't a way I could find to test formulae on the Testing page in Google Sheets.
To attach a sample workbook click on the GO ADVANCED button and then scroll down to Manage Attachments to open the upload window.
Let me know if you have any questions.

This solution modifies two of the formulae found in this article.
Notes: The calculation of G2 and H2 is respectively changed to: =A2+B2 and =C2+D2
Two cells have been added: X2 is the Peak Start and Y2 is the Peak End, this allows flexibility, as opposed to hard coding, should these times change at a later date.
The first modified formula, which is the main formula in the article, calculates the peak hours and reads:

Formula:

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The second formula takes a formula, called the 24 hour variation in the article, and subtracts the peak hours to calculate non-peak hours and reads:

Formula:

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Let me know if you have any questions.

You are both Welcome and Correct. For the benefit of future readers of this thread a formula, in S2, that would subtract 'peak hours' from 'total duration' is:

Formula:

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If after further testing you find that the solution works for all cases, please take a moment to mark the thread as 'Solved' using the thread tools link above your first post. I hope that you have a blessed day.