Concrete Products
Hawaiian Rock Products (HRP) operates a state-of-the-art block manufacturing facility capable of producing up to 7,000 standard 8-inch concrete masonry units (CMU) per shift. We offer a wide variety of concrete products, including 4-inch, 6-inch, 8-inch, and 12-inch CMU blocks, breezeway blocks, pavers, retaining wall units, and split-faced architectural blocks to meet the diverse needs of residential, commercial, and government construction projects.
Quality is at the core of our manufacturing process. All block products are routinely inspected, sampled, and tested by our in-house Quality Control Department to ensure compliance with ASTM C90 requirements. Our standard blocks consistently exceed the minimum compressive strength requirement of 1,900 psi, and we are capable of producing specialty hollow concrete blocks with strengths of up to 4,000 psi for demanding project specifications.
HRP is also Guam’s only manufacturer of Reinforced Concrete Pipe (RCP) and precast concrete manhole structures. Our RCP products are available in diameters ranging from 12 inches to 48 inches and are manufactured using a dry-cast packer-head process to ensure durability and consistency. Concrete manhole sections are produced using precision steel-jacket forms that deliver uniform dimensions and reliable performance. We offer multiple cone configurations, various riser heights, and custom monolithic bases with block-outs designed to meet specific project requirements.
To further strengthen our manufacturing capabilities, Hawaiian Rock Products has recently invested in significant upgrades to critical components of our block production plant. These improvements enhance equipment reliability, reduce downtime, increase production efficiency, and help ensure a consistent supply of high-quality products for our customers. Our ongoing commitment to reinvesting in our facilities and equipment reflects our dedication to continuous improvement, operational excellence, and providing the dependable, quality concrete products that Guam’s construction industry has trusted for decades.
