These are constants known as 100 type F vertical constant supports. They support pipe from below by means of a sway strut. They are fabricated from A36 carbon steel and hot dipped galvanized to prevent rusting. The constant in the first picture maintains a constant load of 7,000 lb. while the constant in the second picture maintains a load of 9,000 lb. on the pipe throughout its 4” of total travel. They are 36” high with two gussets at the base plate to prevent the coil housing from collapsing under test loading and normal operation. Standard load and travel testing was performed on the constant to insure proper field operation.