The FS Series Campfire Rings combine a single level cooking grate with our flanged fire ring – an economical design when cooking over the fire might be a lower priority.Fire ring is rolled from a 3/16" thick steel plate with an integral formed 1" wide flange around top edge.  This flange provides extra strength against heat warpage and eliminates a vertical edge. Draft holes are provided for fire ventilation.290 sq. inch single level cooking grate is hinged to the campfire ring and remains permanently attached.Model FS-30 Series Campfire Ring features a 30” inside diameter and is available in three different side heights of 7-3/8”, 9”, and 11-3/8”.FS Series fire rings include tip back anchor pins (/TB) to keep the campfire ring secured in one place, but allow the fire ring to tip up for easy clean out.  These pins must be set in concrete.Cooking grate adjustment handles, made from 3/4" dia. steel, reach outside of the firering, away from the fire.  The handle grips are 1/8" x 1/2" coiled steel bar.  The cooking grate is built using 5/8" dia. steel perimeter bars and 1/2" dia. steel grate bars. All grate bars are welded on both sides.  The grate hinges are formed using 5/8" dia. steel bar.OPTIONAL Anchor Systems:Angle Spade Anchors (/AL) are 3 spades attached around the firering and buried in the ground. The firering cannot be tipped up.Tip Back Spade Anchors (/TA) are 2 spades at the rear hinge point and buried in the ground. The firering can be tipped up.OPTIONAL: Model S-5 Bolt-on utility shelf