industrial ground protection boards 3×8 ft for architecture All products under 8 feet long HDPEp via UPS or FedEx ground. All ite over 8 feet long HDPEp by freight carrier (truck). 3-sided bea, L-headers (2-sided bea) and mantels HDPEp fully assembled. 4-sided bea HDPEp as a 3-sided beam and a pre-fitted (mitered) 4th side to be installed on site.