https://journals.northampton.ac.uk/index.php/tsib The University of Northampton en-US Transportation Systems in Buildings 2631-8156 <p>The author(s) must warrant that an article is original and the sole work of the author(s); the author(s) must also obtain relevant permissions from any third-party copyright holders. Where an article or report has more than one author, the submitting author is responsible for ensuring that all other authors agree to the terms of submission.</p><p><span style="font-size: medium;">Copyright and associated moral rights in works published in <span style="line-height: 115%; font-family: 'Verdana','sans-serif'; font-size: 11pt; mso-fareast-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: PL; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="PL"><em>Transportation Systems in Buildings</em></span></span><span style="font-size: medium;"> are retained by the authors. Authors grant to The University of Northampton and <span style="line-height: 115%; font-family: 'Verdana','sans-serif'; font-size: 11pt; mso-fareast-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: PL; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="PL"><em>Transportation Systems in Buildings</em></span></span><span style="font-size: medium;"> non-exclusive rights to reproduce works electronically (in full or in part) and to publish works in any such media current or later developed. By virtue of their appearance in this open access journal, works may be used freely, with proper attribution, in educational and other non-commercial settings. </span></p> https://journals.northampton.ac.uk/index.php/tsib/article/view/169 <p>The traditional elevator system design practice is to calculate the round trip time (RTT) and associated parameters of pure incoming traffic during up-peak, followed by real-time computer simulation. Recent studies indicated that the normal traffic is much more complicated, consisting of a mixture of incoming, outgoing and interfloor patterns. The Universal RTT, under such complicated traffic patterns, was analytically developed eight years ago based on the concept of an appropriate origindestination matrix describing the passenger transit probability, and verified by Monte Carlo simulation. That model is based on the assumption that the total number of passengers demanding service within one round trip is limited to the elevator contract capacity, which is in line with the traditional up-peak incoming RTT formula. The idea of extending the consideration to beyond the contract capacity was initiated two years ago. In this article, an in-depth study on such consideration is carried out so that the performance such as RTT, handling capacity (HC) and mean transit time (MTT) etc. under different traffic patterns is evaluated and analyzed with the help of Monte Carlo simulation. This article may help designers optimally size an elevator system during the RTT calculation stage without oversizing it if the prevalent traffic patterns of the building are known.</p> Albert Ting Pat So Lutfi Al-Sharif Copyright (c) 2023 Transportation Systems in Buildings 2023-11-03 2023-11-03 5 1 10.14234/tsib.v5i1.169 https://journals.northampton.ac.uk/index.php/tsib/article/view/168 <p>The major part of the design and specification of equipment for the arrest or prevention of overspeed, particularly the safety gear/overspeed governor combination, concerns itself with the performance when carrying rated load, or, in the event of upward overspeed, zero load in the car. In particular, specification is concerned with performance of safety equipment in the face of suspension failure, however unlikely that might be. This paper sets out to investigate the performance of overspeed protection when there is a partial load in the car, whether with a failed suspension or not, and to discuss the opportunities in this respect provided by the introduction of the so-called rope brake.</p> Phil Andrew Copyright (c) 2023 Transportation Systems in Buildings 2023-11-03 2023-11-03 5 1 10.14234/tsib.v5i1.168