Project Objective
To design or refine a latching and dampening system, and to complete a working prototype for the Portland Loo by June 15th, 2017 that: adheres to ADA standards, boasts improved durability and security, and has the ability to remote lock electronically or be otherwise programmed for timed locking.
Team
The project team is
- Kyle Bazon
- Jeff Carveth
- Jesse Howser
- Nathan Richards
- Matthew Stewart, web, tumblr, email
Customer/Market Requirements
The project sponsor requires a device that satisfies ADA requirements and is more sabotage resistant than currently implemented, off the shelf latch and lock designs.
Design Challenges
The design team is focused on three main door subsystems: the closer/damper, the lock, and the latch. Durability has been a major issue for Madden Fabrication while adhering to ADA requirements. The designed setup must be able to be retrofitted onto an existing Portland Loo without modifications to the existing structure. The lock produced must have handles and throws that are accessible with reduced dexterity, making it operable with a closed fist and a maximum of five pounds of force used to open. The closer/damper must operate the door from 90 degrees to close with a time of no less than five seconds.
Outcomes
The team has developed a conceptual design that satisfies customer requirements for an off the shelf design as well as a physical prototype currently installed on a Portland Loo, located on SW Naito Pkwy and SW Taylor St. The design features a modified deadbolt and custom escutheon, handle, strikeplate (tentative), and tailpiece. Materials were chosen for optimum durability and aesthetics fitting with the Portland Loo theme designed by Madden Fabrication. The current commercial damper was determined to be sufficient for the Loo setup and ADA standards.
The following shows the physical prototype produced:
