The kkStB network included many lines on which both passenger and express trains could not travel faster than 70 or 75 km/h due to the topographical conditions. When the four-coupled locomotives were no longer sufficient for these services, it was necessary to switch to a six-coupled one. At that time, the 4-6-0 wheel arrangement was popular in other countries, but it didn't offer much space for a large firebox between the coupled wheels. Since a trailing axle was needed due to the low-energy coal in Austria, the class 110 for faster trains had been introduced as early as 1905 with a 2-6-2 wheel arrangement. So Gölsdorf also developed the class 329 with this wheel arrangement, but a driver diameter of only 1,614 mm.