Wall Thimbles

Thimble types derive their names from the shapes of their cross-sections. The most frequently used thimble is the F-type. A thimble similar to the F is the E-type. The E-type thimble may also be required when slide gates are subjected to very high unseating heads. Mechanical joint thimbles are available in round openings for attachment of ductile iron pipe.

Fasteners, packing, and follower rings are available. Another variation of the mechanical joint thimble is the push-on joint type (bell and spigot. Standard lengths are 12" to 18" and use of standard lengths will facilitate early delivery. Thimbles are stamped “Top” and have the vertical centreline located to aid in alignment.   

Features

• Because a thimble is an entirely separate part, it can be shipped prior to the gate so that it can be included in the construction forms before the concrete is poured.
• When a thimble is used, nearly all anchor bolts are omitted. Only those anchor bolts needed above the gate opening to support the top ends of the gate are required.
• Problems associated with mounting a gate directly on concrete can be avoided with thimbles.
• When a thimble is used and the gate arrives on the job, a good machined surface is already in place for attachment of the gate flange. Studs are used for attaching the gate frame to the thimble. These are quickly installed and the back of the machined frame is pulled up against the front face of the thimble. This simple procedure eliminates the time-consuming job of installing the gate on anchor bolts, aligning it, and grouting behind the frame. A thimble permits the gate to be removed and transferred to another location for cleaning and painting. Future gate installations can be provided for by placing thimbles when the concrete is poured, then covering the openings with blind plate flanges until the gates themselves are required.
• Available in cast iron, painted steel or stainless steel.