In 1947, "Loadmaster" referred to the size of the truck, not necessarily the size of the engine.
In 1947, the Thriftmaster trucks were all 3100-3800 (1/2, 3/4, and 1-ton).
In 1947, the Loadmaster trucks were all 4000 series and above trucks.
The 4000 series Loadmaster trucks came standard with a 216.5 ci engine and the 235.5 ci engine was an option. On Loadmaster trucks larger than 4000 series, the 235.5 was the standard engine.
From 1949 to 1953, the words Thriftmaster (216.5 engine), Loadmaster (235.5 engine) referred to the size of the engine.
In 1954/55 Thriftmaster referred to a 235.5 engine, Loadmaster referred to a 235.5 engine (with slightly different parts), and Jobmaster referred to 261 engine.
As stated above, in 1947, the door-jamb plate that show 16,000 would be a 2-ton truck (a 5000 and higher series 1.5 ton truck would show 13,000 or 15,000 on the plate - see below for more information on 4000 series trucks).
Here are all the 1947 models and GVWs (etc) 
