Private company

Pittsburgh-Des Moines Steel Co.

American steel fabrication company

The Pittsburgh-Des Moines Steel Company (originally the Des Moines Bridge and Iron Company), and often referred to as Pitt-Des Moines Steel or PDM was an American steel fabrication company. It operated from 1892 until approximately 2002 when its assets were sold to other companies, including CB&I (formerly Chicago Bridge & Iron Company).2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

  • Industryiron and steel industry1
STL Skyline 2007 edit cropped
Photo: STL_Skyline_2007_edit.jpg : Buphoff derivative work: ← fetch comms, CC BY-SA 3.0, via Wikimedia Commons3

The Pittsburgh-Des Moines Steel Company (originally the Des Moines Bridge and Iron Company), and often referred to as Pitt-Des Moines Steel or PDM was an American steel fabrication company. It operated from 1892 until approximately 2002 when its assets were sold to other companies, including CB&I (formerly Chicago Bridge & Iron Company).2