Technical Services

Technical Service Contact Information

ClarkDietrich's Technical Services provides immediate response to engineers, architects, contractors and builders, ranging from general questions to detailed specification requirements. Examples include questions about industry standards such as AISI, ASTM or SFIA, standard details and limited member sizing. Our technical service department also provides support for SubmittalPro, our online product submittal system, and ClarkDietrich iTools.

For quicker and more accurate member sizing for Curtain Walls, Opening Framing and Floor Joists: Print and fill out the below Technical Sizing Sheets. Then email it to our Technical Services Team at You will receive a response within one working day.


Curtain Wall Sizing Sheet (New Sizing Webform)

RedHeader PRO Sizing Sheet

Try the ClarkDietrich iTools RedHeader PRO Lookup Tool

  • Interactive user filters for opening type and design requirements
  • Checks systems that work together as required by design
  • Creates a Design & Submittal Package​​

HDS Preliminary Sizing Sheet

Floor Joist Sizing Sheet