Moment Resistant Building Column Insert System And Method

Abstract

A moment resistant building column insert system is provided that enables the erection of beams to columns, and the installation and pretension of connection bolts possible in a single stop to each beam-column joint in the field. Included is a building column insert with pre-hardened structural filler inside, and a pattern of through-holes transverse to the insert length, where the insert has threaded elements disposed inside and concentric to erection holes in the pattern. The insert is disposed inside a building column. Erection bolts installed to the erection holes to hold the beam in place against the column with the holes in the beam mounting plate, the column and insert aligned. Connection through-bolts are installed and pretensioned to provide the connection strength needed to make a beam-column moment joint rigid. Without the pre-hardened structural filler in the insert the column would deform or crush due to the bolt pretensioning.

What is claimed: 
     
         1 . A moment resistant building column insert, comprising:
 a. an insert column of generally tubular shape;   b. a pre-hardened structural filler disposed within said insert column;   c. a pattern of through-holes transverse to a length of said insert column and through said pre-hardened structural filler;   d. at least a pair of erection through holes disposed through a wall of said insert column;   e. at least a pair of threaded elements incorporated to an inner wall of said insert column and disposed concentric to said pair of erection holes;   f. a threaded element cover disposed over each said threaded element, wherein said threaded element cover is surrounded by said pre-hardened structural filler, wherein said threaded element cover forms a cavity around said threaded element within said pre-hardened structural filler, wherein said threaded element cover is disposed to protect said threaded elements from contamination by said structural filler; and   g. an insert positioning element disposed axially along said column, wherein said insert positioning element comprises a positioning through-hole disposed for receiving a hoist end there though, wherein said moment resistant building column insert is disposed inside a bottom end of a first building column and inside a top end of a second building column, wherein said moment resistant building column insert joins said first building column to said second building column.