Notes: Use all specified fasteners in schedule to achieve values indicated. Values are based on 1 1/2" header and joist thickness. This table is based on Miami Dade County NOA #08-0326.11 and Florida Approval 599R4. See General Notes. NVBH 24 Butterfly Hanger Fasteners Schedule Allowable Loads (lbs) Size Product Code Gauge Header 8d Joist 8d Downward Gravity Loads Box Size Price ADD TO CART 2 x 4 NVBH 24 18 12 6 1113 100pcs $61.00