You are pushing the SRW/DRW territory. Just because it says 16K does not magically make the weight stop there!
VERY common for 25 percent pin as in the weight pushing down on your truck can EASILY be 4,000#+.
Our 5er has a 21k rating and it weighs 23K with 25 percent pin!!!
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"
"HeavyWeight" B&W RVK3600
2016 MobileSuites 39TKSB3 highly "Elited" In the stable
2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD