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New users1, if you've never used STI software, get a FREE six-month license for our suite of six precast / prestressed concrete engineering software applications so you can really get to know what they can do!

The free licenses are for fully functional software. No 15-execution limit like you've seen with the free trials you run without the Marx key. No limit on the size of the structure or member. Nothing to get in the way of your evaluation of the software.

If you don't have a Marx USB hardware key from us, a $30 deposit is required on the hardware key. The deposit is fully refundable2 when you return the key. Follow the steps below to get a hardware key.
  1. Click here to open the form (in PDF3).
  2. Fill it in.
  3. Print it out.
  4. Mail it with your check for the deposit.
 Download Form
Download Software

If you already have a Marx USB hardware key (because you currently license one or more programs) just send an e-mail to Sales@PrecastEngineer.com and tell us for which key(s) (by number) you want a free license. We will send you a six-month promotional license for the balance of the suite.

Each company or organization may get as many keys as they want. Just pay the deposit on each key.

1 This is an offer to new users in the USA only. Current customers cannot use this offer to extend their licenses. Or if you've already enjoyed a six-month promotional license, this offer does not apply to you.

2 When returning a Marx HW key, you must package the key so it will pass through the USPS mail handling equipment without getting separated from the packaging. We will not pay a refund for a torn, empty envelope.

3 PDF - Acrobat® Reader® is required to view and fill in this form. Click here to get a free copy of Adobe Acrobat Reader.