Each fermentation will be different for time and wort temperature. The one constant is that the fermentation is not complete until the specific gravity readings have stabilized over a period of days. Low OG beers will take less time for the active fermentation to end than a high OG beer. Your golden strong is in the high OG range. Take a specific gravity reading for your golden strong about day 13 to 15. Take another reading 3 to 5 days later. Two specific gravity readings, separated by days, that are the same will mean the active fermentation is complete. Off flavor clean up, especially diacetyl, begins when the active fermentation is tapering off.
I would plan for at least four weeks in the primary for this beer, five weeks may be needed for sediment and excess yeast to drop out, and the yeast/trub layer to compact. Until most of the CO2 in the beer has off gassed, sediments will be held in suspension. Extra time will not be detrimental to the beer.
Check the clarity, amount of CO2, and taste of each hydrometer sample you take.
This beer many would probably use a secondary for a few weeks. I'm not much of a person for using secondaries anymore. If this were my brew, 5 to 6 weeks in the primary, and then an extended bottle conditioning time.