The entrance to the Ulam was the largest of all the Temple gates. It was forty cubits high and twenty cubits wide. * The other gates were twenty by ten cubits. At the entrance to the Ulam, there was a curtain and not doors as in the other entrances. (Alternate view.) (Source: Midot 2:3). 
The Decorative Lintels
Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII