We are working on the modernization of the Visitor's Center at the El Yunque National Rainforest in Puerto Rico.  El Yunque is a USFS National Park, and the forest is managed by the USFS and U

We have always used industry standard steel letters as backup for structural steel recycled content from people like Nucor, Atlas Tube, Gerdau, etc.

Hello all,

Previous versions of LEED stipulated the Material and Resource Credits only applied to Divisions 2-10 products. 

Reference Guide correction 100002183 allows this 30% to be adjusted based on the percent value of structure/enclosure materials compared to total material costs. Actual cost must be used.

Has anyone had any luck claiming compliant bio-based content with a product that is certified as a "USDA Certified Biobased Product"?  It looks like testing is done via ASTM test method D6866,

Need a sanity check here...

Does anyone have a "fillable" precast wall assembly calculator they can share?

Has anybody ever looked into trying to get landscaping plantings (grass, trees, schrubs) to be accepted as a compliant bio-based material?

If the manufacturing process I am involved with consumes aluminum coil to produce our end product can we use the internal scrap percentage of the aluminum reused/reverted at the mill as either pre