Think of the ramp as the hypotenuse of a right triangle. The horizontal right-angled side is 12 and the vertical right-angled side is 1.

The barrier-free ramp 1:12 on the Jianshi map is a straight ramp, the slope width is not less than 1200, and the slope is not greater than 1:12; the return double ramp has a slope width of 1200 and a slope of 1:12, the starting point and end point of the ramp and the depth of the rest platform are 1500. L ramp, arc ramp, U-shaped ramp, three-turn ramp, the slope width is 1200, the slope is less than 1:12, the starting point and end point of the slope and the depth of the rest platform are 1500.

The combination of steps and ramps is suitable for construction intersections, city squares and other areas with large ground height differences. It saves land, is convenient for traffic, and has good viewing effect. The slope should be flat but not smooth, the width should be greater than 1200, and the slope should be less than 1:12. Others are determined by the designer.

Building construction is a production activity in which people use various building materials and mechanical equipment to build various building products in a certain space and time according to a specific design blueprint. It includes the entire production process from construction preparation, groundbreaking to project completion acceptance.

In this process, construction preparation, construction organization design and management, earthwork engineering, blasting engineering, foundation engineering, steel bar engineering, formwork engineering, scaffolding engineering, concrete engineering, prestressed concrete engineering, and masonry engineering will be carried out. , steel structure engineering, wood structure engineering, structural installation engineering and other work.

Building construction is a technically complex production process that requires construction workers to use their ingenuity and creatively apply materials, mechanics, structure, technology and other theories to solve technical problems that constantly arise during construction and ensure project quality. and construction safety. This construction process involves multiple types of workers operating within a limited time and a certain space.

The supply of hundreds of materials and the operation of various mechanical equipment require scientific and advanced organizational management measures and the use of advanced construction techniques to successfully complete this production process. This process is also a process with greater economic efficiency. A large amount of manpower, material and financial resources will be consumed during construction.

Therefore, it is required to consider the economic benefits during the construction process and take measures to reduce costs. During the construction process, people's focus is always on project quality, safety (including environmental protection), progress and cost.