Xushui Cement Manhole Cover Manufacturer 1. Installation instructions: The anchoring sheet of the supporting frame must be firmly embedded in the cement layer; 2. Type layout according to the length of the trench (well), take the standard board width 995mm in accordance with the processing modulus, and leave a gap of 5mm between boards ; 3. The supporting surfaces on both sides of the ditch must be flat and solid; 4. The remaining length of the ditch (well) less than 1 meter is determined by the modulus; 5. The steel grid plate model is selected according to the ditch (well) width and bearing requirements ; 6. It is recommended to choose a standard size for design and construction; 7. The direction of flat steel is the direction of bearing (support), and the length L of flat steel is determined according to the width of the trench (well).