Yes, a canopy or roof can be added between two shipping containers, but it is not safe to treat the containers as interchangeable blocks for an off-the-shelf tarp. The complete assembly needs site-specific review of snow, rain and wind loads; container spacing and condition; bracket or weld details; foundations and anchorage; drainage; fire and access needs; and local permits.
The roof changes what the containers are doing
Do not buy by width alone
Compare the site demand with the product rating
Trace every reaction to the ground
Decide where rain and snowmelt will go
An enclosed end changes use and fire questions
Installation is a lifting and weather operation
Operate the canopy as a structure, not a disposable cover
Price the roof, supports and approvals as one system
Provide the site address, container sizes and photos, clear span, intended use and whether end walls are planned. Ask the team to identify the design basis, foundations, attachment model, drainage, installation and inspection responsibilities.

