The gazebo was shipped in two boxes totaling 500 pounds which easily fit in an SUV with rear seats folded down, or a pickup truck. The two heavy boxes were 90"x29"x13" (248 lbs) for all but roof panels, and 80"x28"x5" (248 lbs) for just roof panels. Heavy-duty cardboard shipping boxes had inner ~1 cm light steel box beam frame to prevent box crushing. Only two long beams had slight, inconsequential bend damage at one end. All parts were included along with some spare bolts and washers in case you drop any and can't find them. All parts were properly machined except one roof panel "#4" which had a bolt hole 2" mispositioned, which I marked and drilled from another "#4" roof panel as a template (there was no need to order a replacement panel).
Assembly started with frame building, which then gave us the four 12" concrete tube footing locations to pour. You can alternatively build on a large existing deck with (3) 1/2" bolts through each of the four provided steel footing plates. They provide (12) steel L-shaped anchor rods to embed in concrete in the event you don't use your own 1/2" galvanized, embedded bolts.
Once frame anchoring was complete and concrete was cured, the roof construction began with an inner frame of upward bars joining at a steel plate at the top, and horizontal bars between the upward bars. Then roof panels were added left to right, each overlapping the previous. That was a little tricky, to get panels aligned to screw in attachment bolts through to roof frame captive bolt holes. I used a fiberglass 8-foot step ladder to do all of roof frame-building and panel attachments. I leaned fiberglass step ladder against outer rail frame without damage when installing roof panels. My assistant had to be on a freestanding 5-foot step ladder underneath the roof to put spacers in between frame and roof panel as I installed the panels and bolts overhead.
Most of the work was done with just two people, but at certain times we needed four people, including moving each of the 248 pound shipping boxes, erecting the 12' x 16' frame and pouring concrete footings. For all other assembly having additional people beyond two could make it go faster, but was not required. Shipment took 9 days, and then we completed construction in 8 days, including concrete curing time and time lost to record hot weather. Metal roof measured 152° in direct sunlight when outdoor temperature was 97°.
All provided bolts were 6 mm diameter, and they included (2) small tightening wrenches which must be used in some tight clearance locations, but the vast majority of the hundreds of bolts were screwed in and torqued to 5 to 9 ft-lb using a battery-powered drill motor with six-point, 10 mm driver bit. That made it take far less time to do assembly.
The completed gazebo looks very nice, and just hours after we finished construction there was a severe thunderstorm with high wind and a deluge of rain. The gazebo withstood it without any trouble, and the roof did not leak. The all-metal roof is high enough inside to fit a 7-foot tower-type propane heater during cold weather. Overhead clearance at side rails is about 6.5 feet, and inside roof peak is about 9.5 feet where wind chimes (or shade loving hanging plant) hook is located. Zippered screen curtains hang on sliding tracks on all four sides. They slide easily for tying back at the corners.