100 Eleventh Avenue
New York, New York
Tyler E. Graybill | Structural Option
Thesis Proposal

Structural Depth

Post-tensioning will be studied as a means of reducing the slab thickness of portions of 100 Eleventh Avenue's floor sytem. The two areas to be considered are as follows:

-Slab perimeter, where the floor thickens from 9" to 18.5" due to increased spans and imposed loads fromt the building facade
-19th level transfer slab; a heavily-reinforced, 18.5" floor system

The study will compare the results of the post-tensioned design to that of the existing, using criteria such as cost/material, weight, appearance, and practicality.

M.A.E. Resources: RAM Concept, a structural analysis and design program that utilizes the finite element method for elevated concrete floor systems, will be utilized in the post-tensioned design process. Concepts learned in AE 597A: Computer Modeling will be drawn upon to learn and use this analysis program. These concepts include the stiffness method, behavior of truss, beam, frame, and grid elements, and interpretation of computer analysis results.


Breadth I: Construction Impact
The impact the post-tensioned redesign will have on the construction process will be studied. Items such as schedule, cost, sequencing, and NYC's familiarity with post-tensioning will be addressed.

Breadth II: Shading
Because nearly half of the building's perimeter is clad in glass, managing the amount of natural light entering its spaces is an important issue. Effort will be taken to find an efficient, more attractive option than the current system of remote-controlled Lutron roller shades. Attention will also be payed to the amount and quality of penetrating light.
Executive Summary (12/15/09)

Revised Senior Thesis Proposal (1/12/10)
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This page was last updated on 9/01/09 by Tyler E. Graybill and is hosted by the AE Department ©2009

User Note: While great efforts have been taken to provide accurate and complete information on the pages of CPEP, please be aware that the information contained herewith is considered a work‐in‐progress for this thesis project. Modifications and changes related to the original building designs and construction methodologies for this senior thesis project are solely the interpretation of Tyler Graybill. Changes and discrepancies in no way imply that the original design contained errors or was flawed. Differing assumptions, code references, requirements, and methodologies have been incorporated into this thesis project; therefore, investigation results may vary from the original design.