Top Right: Drawing no. 101.ITF.54: Reinf. Details; Joint Nos. 94, 99, 105 & 109 (Hall of Nations)
Left, top and bottom: Drawing no. 101.ITF.64: Reinf. Details; Typical Joint with Nine Members–Inner Face (Hall of Nations) Drawing no. 101.ITF.53A: Reinf. Details; Joint Nos. 88, 100, 104, 110 & 113 (Hall of Nations)
Details of configurations of lapping and anchorage of reinforcement bars at different nodes. Detailing involved resolution of the congestion of bars at any given joint. On average, nine members met at a node, with four bars per member–an estimated 36 bars would pass each node, some in compression and some in tension. This congestion was artfully reduced by a system of lapping bars from the four lower members with bars of the four upper members accounting for 16 bars and finally, only 20 bars passed through a node.
The nodes were constructed by lap-welding members with straightlength bars to short-length curved and bent bars placed in the joint. The sequence was to cast the straight length of a member from joint to joint, place in position partially pre-assembled formwork of the joints along with placed-in-position short-length curved bars. These bars were welded with straight bars of members, formwork of the members up to the next joint was erected and then the next member and joint concreted. (See construction photos, previous page)
(bottom right) Photo of a node with more than nine members.
Source: Mehta, Vandini, Rohit Raj Mehndiratta, and Ariel Huber. "Hall of Nations and Halls of Industries, New Delhi, 1972." In The Structure – Works of Mahendra Raj, 152-179. University of Chicago Press, 2016
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- Mahendra Raj inspecting the foundation plans of the Hall of Nations, Tuesday, April 18, 2017 - 20:45
- "Hall of Nations and Halls of Industries, New Delhi, 1972." In The Structure – Works of Mahendra Raj, 152-179. University of Chicago Press, 2016.