Hello Dirk,
We typically do not need a complete SIP design to start a package. Typically we will receive a set of plans that are for a conventional stick frame design and we will make the changes for SIP construction. We do not really charge for this and it is a part of the SIP package. We take the SIP design plans and create the SIP shop drawings for the manufacture. Most of the manufactures we work with use CNC machines so we format the .dwg file appropriately for there CNC program.
In most cases we can quote a SIP package with just a basic set of plans before they have been changed to SIP. Once we have agreed to the project we then create the SIP plans that the shop drawings are created from. In turn the SIP assembly drawings are created from the shop drawing set.
Thanks,
Matt B. Phelps, P.E., R.S.
Advanced Green Building Products, LLC
[email protected]