Construction is wrapping up on Chelsea Canvas, a 14-story mixed-use building at 278 Eighth Avenue in Chelsea, Manhattan. Designed by FXCollaborative and developed by Alchemy-ABR Investment Partners and Chelsea 23rd Realty Corporation, an LLC affiliated with JJ Operating, the 175-foot-tall structure spans 132,700 square feet and will yield 190 rental apartments in studio to three-bedroom layouts, as well as 33,000…