Method of forming joint construction of precast concrete columns and beams

Claim 1

A method of constructing rigid structural joints between precast concrete columns and beams by utilizing splice sleeves of almost the same depth as the beams, said method comprising the steps of: a. vertically positioning a lower column having reinforcing bars extending from the upper end thereof; b. positioning a sleeve on the lower column in such a fashion that the opposed open ends thereof align with the reinforcing bars of the columns; c. inserting the reinforcing bars in the sleeve; d. positioning the end portion of a first beam formed with a groove which is U-shaped in cross section on the lower column; e. positioning the end portion of a second beam formed with a groove which is U-shaped in cross section on the lower column; f. placing a set of pre-assembled bars in the space formed by the two grooves in the first and second beams; then g. placing an upper column having reinforcing bars extending from the lower end thereof on the lower column in a fashion such that the reinforcing bars extending from the lower end thereof are inserted within the sleeve; then h. filling the interior of the sleeve with a grouting material to lock the reinforcing bars from the upper and lower columns to each other; and i. filling the space formed by the two grooves and extending across the ends of both columns with concrete in order to make the columns and beams monolithic.

Claim 2

A method of constructing rigid structural joints between precast concrete columns and beams by utilizing splice sleeves of almost the same depth as the beams, said method comprising the steps of: a. vertically positioning a lower column having reinforcing bars extending from the upper end thereof; b. positioning a sleeve on the lower column in such a fashion that the opposed open ends thereof align with the reinforcing bars of the columns; c. inserting the reinforcing bars in the sleeve; d. positioning the end portion of a first beam formed with a groove which is U-shaped in cross section on the lower column; e. positioning the end portion of a second beam formed with a groove which is U-shaped in cross section on the lower column; f. placing a set of pre-assembled bars in the space formed by the two grooves in the first and second beams; then g. placing an upper column having reinforcing bars extending from the lower end thereof on the lower column in a fashion such that the reinforcing bars extending from the lower end thereof are inserted within the sleeve; then h. filling the interior of the sleeve with a grouting material to lock the reinforcing bars from the upper and lower columns to each other; and i. filling the space formed by the two grooves and extending across the ends of both columns with concrete in order to make the columns and beams monolithic.

Claim 3

A method of constructing rigid structural joints between precast concrete columns and beams by utilizing splice sleeves of almost the same depth as the beams, said method comprising the steps of: a. vertically positioning a lower column having reinforcing bars extending from the upper end thereof; b. positioning a precast concrete block having: i. a sleeve embedded therein with its upper and lower ends open on the surface of the block and ii. a reinforcing bar embedded therein and extending laterally therefrom on two sides on the lower column in a fashion such that the reinforcing bars of the lower column are inserted in the sleeve; c. positioning the end portion of a first beam formed with a groove which is U-shaped in cross section on the lower column with the reinforcing bar embedded in the block extending into the groove; d. positioning the end portion of a second beam formed with a groove which is U-shaped in cross section on the lower column with the reinforcing bar embedded in the block extending into the groove; e. placing an upper column having reinforcing bars extending from the precast end thereof on the lower concrete block in a fashion such that the reinforcing bars extending from the lower end thereof are inserted within the sleeve; then f. filling the interior of the sleeve with a grouting material to lock the reinforcing bars from the upper and lower columns to each other; and g. filling the space formed by the two grooves and extending across the ends of both columns with concrete in order to make the columns and beams monolithic.

Claim 4

A method of constructing rigid structural joints between precast concrete columns and beams by utilizing splice sleeves of almost the same depth as the beams, said method comprising the steps of: a. vertically positioning a lower column having reinforcing bars extending from the upper end thereof; b. positioning a precast concrete block having: i. a sleeve embedded therein with its upper and lower ends open on the surface of the block and ii. a reinforcing bar embedded therein and extending laterally therefrom on two sides on the lower column in a fashion such that the reinforcing bars of the lower column are inserted in the sleeve; c. positioning the end portion of a first beam formed with a groove which is U-shaped in cross section on the lower column with the reinforcing bar embedded in the block extending into the groove; d. positioning the end portion of a second beam formed with a groove which is U-shaped in cross section on the lower column with the reinforcing bar embedded in the block extending into the groove; e. placing an upper column having reinforcing bars extending from the precast end thereof on the lower concrete block in a fashion such that the reinforcing bars extending from the lower end thereof are inserted within the sleeve; then f. filling the interior of the sleeve with a grouting material to lock the reinforcing bars from the upper and lower columns to each other; and g. filling the space formed by the two grooves and extending across the ends of both columns with concrete in order to make the columns and beams monolithic.