Periodically, we receive questions from customers regarding the accuracy of their combination or back-to-back channel order. For example, sometimes folks call saying they ordered Unistrut P1001, but they think they received P1000. In this post, we’ll clear up the source of this confusion and help you verify the accuracy of your order.
After the roll forming is completed, we place a marking inside the channel every 18” – 24” o.c. A unique identifying number traced back to the mill test report is also imprinted at the same frequency. Double channel (e.g. P1001) and combination channel (e.g. P1001A) are factory-welded using single channel pieces. As a result, the visible part number marking corresponds with the single channel components used during the manufacturing process. For example, P1001 is made from two sections of P1000, so the marking in P1001 reads “P1000”. When the channel is not a back-to-back configuration the number inside the strut matches the actual part number (e.g., P3000).
Another good way to determine the difference between Unistrut P1000 and P1001 is to take a measurement. P1000 is 1-5/8” x 1-5/8” and P1001 measures 1-5/8” x 3-1/4”. If you visit the 1-5/8” Unistrut channel overview section of our website, you’ll also notice that channel part numbers ending with 0 are always single channel iterations—part numbers ending with 01 are back-to-back combos. Just remember Unistrut manufactures back-to-back channel by welding two pieces of strut together rather than roll-forming the part as back-to-back.
We hope this post clears up the mystery of our part-numbering scheme when it comes to back-to-back combinations. If you have further questions about selecting the proper Unistrut Channel for your application or need help placing an order, contact Unistrut Service Company for further assistance.