1. Hull installation progress requirements:

(1) Below the ship’s main deck, welding for hull structure of engine room to sternward;

(2) Below the ship’s main deck, water testing for all the cabins from engine room to sternward;

(3) Hull baseline measurements and shall comply with technical requirements;

(4) a large range of equipment inside the cabin to the stern lifting have been completed.

2. The examination for position and shape of chassis

In theory shaft centerline determined, you can immediately pull the wire in the base line to check the left and right positions, and draw left and right carve lines in chassis plane.

(1) During Ship construction, to install stern tube device, tail shaft, intermediate shaft and propeller on slipway first, on slipway or after boat into the water to install the engine, median figure between the first intermediate shaft flange and the crank shaft output flange: offset value should be less than or equal to 0.10mm, tortuous value less than or equal to 0.15mm / m positioning base.

(2) to install the engine on slipway first, then the tail shaft and so on, positioning of Engine chassis on the theory of shafting centerline: head and trail position (axial) determined in accordance with the cabin layout, that depends on crankshaft head (tail) of a flange on the chassis or the distance between one bolt hole in the chassis and a rib-bit in the hull; the position determined by the theory of centerline of the shaft.

3 .Hull chassis requirements

To install the chassis for the engine and gearbox should in according with the drawing, you should be on overall machining in condition, machining surface finishing shall meet the standard requirements. The chassis not allowed falling in, extroversion inclination should be within 1:200. Nonparallelism of longitudinal plane of the foundation, the length below 2m <2mm, length> 2m, the nonparallelism is <4mm.
Bolt holes to determine the location of the base

4 .Determination of bolt holes of chassis

To set tail shaft coupling flange and the gearbox output flange connector location as a reference, to draw gearbox and the bolt hole locations in chassis panel, and check with the samples of the physical engine and gearbox.

5. Drilling requirements of chassis

After confirming bolt hole for the engine and gearbox on the panel of foundation, you could drill, for reaming to leave a 2-4 mm margin. If the bolt holes collide with lower bracket foundation, notify the technology sector, to revise under the detailed modifications by the technical department, repair smoothly with scraper of the Wing blade of plane.