 |
PRATT |
 |
CURVED CHORD PRATT |
 |
BALTIMORE |
 |
PENNSYLVANIA(PRATT) |
 |
WARREN W/O VERTICAL SUPPORTS |
 |
WARREN WITH VERTICAL SUPPORTS |
 |
QUADRANGULAR WARREN |
 |
SUBDIVIDED WARREN TYPE |
 |
SUBDIVIDED WARREN TYPE |
 |
LATTICE |
 |
WHIPPLE |
