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Connector Tensile Strength = 458 lbf/in

Invisible Structures has recently tested the structural integrity of our snap-fit connectors feature found on the Gravelpave2, Grasspave2, Draincore2 and Slopetame2 products.  One full snap feature was placed in a Grab Tensile test machine and tested to the testing standard ASTM D638 Modified.  Pulled at 2 in/min, the material only deformed, it never fractured. The Tensile Yield Strength was determined to be 458 lbf/in.  The connection between two panels of our rolled products is robust enough for all installed conditions. Download the test results.

Ohio State's RPAC Grass Fire lane

Ohio State University's massive Recreation and Physical Activities Center (RPAC) uses Grasspave2 porous paving as a fire lane surrounding the facility. The modern architectural design is enhanced by the lush and well kept grass fire lane. Read and view more photos of the RPAC project, here.

There's Still Time: Free Pass to
ASLA in DC

Going to the American Society of Landscape Architects Annual Meeting and Expo in DC? Download this free pass and come visit our booth Sept 11-12. Full Show is September 10-13. We can be found at booth 1818. Visit the Landscape Architect portion of our web site to find new ways to use our product line.

Sand Availability

For our Grasspave2 porous paving, we prefer a clean sharp sand (washed concrete sand- AASHTO M6 or ASTM C-33) to fill the 25 mm (one inch) high rings and spaces between the rings. Major home centers and hardware stores have Quickcrete® All Purpose sand that meets our specification. Read more about why to use sand, here.

Did You See Saniplant?

Our Puerto Rico Partners, Saniplant, have been exhibiting extensively at shows in and around San Juan. Just this past September 2-5th, they were at the AGC (General Contractors) Show. Find Saniplant's contact info, and find a local partner near you, here.

Join Us for a Webinar

Please join us for a free product presentation on Wednesday, September 22th, at 12 pm Mountain Time (2pm Eastern). We will start granting access 10 minutes before the presentation at http://isi.acrobat.com/entireline/. IMPORTANT - Call 800-233-1510, prior to the presentation, for information on receiving a One Personal Development Hour certificate.