Here are details of our product What is the distance between the columns. 1. The distance between column is 7 feet. Detail of the column. 2. Columns are 6x6 inches (150x150 mm), use 7 pieces of 3 mm steel bar with stressing system, length is depend of your requirement. Detail of erection. Make a foundation for columns of 2x2x2 feet and feel with concrete, then insert sheet in between two columns. Size and thickness of the panels 3. 7x1 feet and 2 inch thickness A sketch showing the panels details. 4. Length 7 feet (2100 mm), height 1 feet (300 mm), width 2 inch (50 mm), use 3 mm steel bar with stressing system. Technical details of the product. 5. Vertical concrete posts as well as horizontal planks is caste using pre-stress technology with designed concrete mix to achieve maximum durability and strength. Time of delivery 6. 3-4 days after receiving order. Weighted