Floor Blocks

Fixed Combination Floor Blocks

• Used with individual wire guided, J-Guide, or T-Bar sets.
• Economical, fixed floor block for use on sets with limited travel.
• Rope lock (010-533R) and floor block in a single unit.
• 8″ diameter Nylon sheave or ASTM Class 30 grey iron sheave, grooved for 3/4″ rope.
• Sealed precision 17mm ball bearings.
• Incorporates tie off points for guide wires.

Adjustable Combination Floor Blocks

• Used with individual wire guided, J-Guide, or T-Bar sets.
• Rope lock (010-533R) and floor block in a single unit.
• ASTM Class 30 grey iron sheave, grooved for 3/4″ rope.
• Sealed precision ball bearings.
• Incorporates tie off points for guide wires.
• Sheave position may be adjusted to properly tension the hand line.

Sliding Tension Floor Blocks

• Used with manual fire curtains to provide proper tension in the hand line.
• 12″ diameter ASTM Class 30 grey iron sheave with machined groove for 3/4″ or 1″ rope.
• Tapered roller bearings.
• Sheave “floats” on two 3/4″ diameter rods.

Tension Floor Blocks

• Used as the return pulley for the hand line in J-Guide or T-bar manual counterweight sets.
• Minimum 40 lb. weight to properly tension the handline.
• Kick tab permits easy readjustment of the block.
• ASTM Class 30 grey iron sheave.
• Sealed precision ball bearings.
• Steel shoes.
• Special grooves and shoe sizes available, consult factory.
• Also known as “Welch” tension blocks, after the J. R. Clancy employee who developed the block in 1925.

Custom Blocks

• Used with wire guide locking rail. Due to their limited travel, wire guided sets can use this economical fixed floor block.
• 8″ diameter Nylon or ASTM Class 30 grey iron sheave, grooved for 3/4″ rope.
• Sealed precision 17mm ball bearings.
• 12 gauge side plates fully enclose sheave.
• Additional spacers are provided for arbor guide wire attachment.
• Floor block clip package includes mounting hardware for attachment to 011-518 locking rails.