Quality Requirements for Softball Field Construction

The quality requirements for the construction of softball fields are the same as those for the baseball field. The main difference is in the size of the two venues. There are mainly qualified and unqualified grades in the engineering grade.

Soil bed evaluation

1) Appearance assessment

No tumbling, peeling phenomenon, rolling with 12t roller, wheel track no more than 5mm.

2) Allowable deviations, see table

Earth bed tolerance

project

Allowable deviation

Test frequency

Testing method

range

Points

compactness

≥90%

Infield area

1

Field knife, balance

Field area

2

Smoothness

±15mm

Infield area

Field area

5

5

With 3m ruler, feeler

Elevation

±20mm

Infield area

Field area

5

5

Water level gauge, level gauge

Boundary length

±50mm

Full field

2

Rangefinder, steel ruler

Note: 1. The degree of compaction is the main control item, less than 90% is unqualified;

2. If the audience is ≤4 points poor, it is qualified.

2. Grassroots assessment

There is no plum blossom, sand nest phenomenon, with 12t roller, rolling roller track does not exceed 5mm. Allow deviations from the table.

Grass-roots allowable deviation see table

project

Allowable deviation

Test frequency

Testing method

range

Points

compactness

≥2.3t/m3

1000m2

1

Sand filling method

thickness

+20mm,-10mm

1000m2

1

Steel ruler

Smoothness

±15mm

Infield area

Field area

5

5

3m ruler, feeler

Continued

project

Allowable deviation

Test frequency

Testing method

range

Points

Elevation

±15mm

Infield area

Field area

5

5

Level gauges and leveling feet

Boundary length

±50mm

Full field

2

Rangefinder, steel ruler

Note: 1. The degree of compaction is the main control item, less than 2.35t/m3 is unqualified;

2. The person who passes the game with ≤ 4 points is qualified.

3. Surface evaluation

1) Appearance

No water, no skin, no dust, uniform color, no whitening, no fading.

3) Allow deviations from the table

Surface tolerance

project

Allowable deviation

Test frequency

Detection method

range

Points

compactness

≥90%

Full field

1

Ring knife, balance

Smoothness

±5mm

Full field

5

3m ruler, feeler

thickness

±10mm

Full field

1

Drilling, steel ruler

Elevation

±5mm

Full field

5

Level gauges and leveling feet

pH value

5.5~7.0

Full field

2

Test paper

Boundary length

+50mm

Full field

2

Rangefinder, steel ruler

Note: 1. The degree of compaction is the main control item;

2. The appearance of each item counts;

3. Those who are less than or equal to 4 points are qualified;

4. Those who exceed 4 points of poor quality are unqualified.

4. Lawn assessment

1) Appearance

Disease-free death, uniform color.

2) Allow deviations from the table

Lawn tolerance

project

Allowable deviation

Test frequency

Testing method

range

Points

Grass seedling length

Number of plants

4~6cm

2~4 strains/cm2

Full field

Full field

5

5

Steel ruler

8cmx8cm square grid

Blade width

1.5~3.0mm

Full field

5

Steel ruler

Leaf color

Dark green

Full field

5

Photometer

Note: 1. Master number of plants;

2. The appearance of each item is calculated;

3. Those who are less than or equal to 4 points are qualified;

4. Those who exceed 4 o'clock are unqualified.

Respiratory System Model

This Respiratory System model is suitable to medical institutions to explain human anatomy, such as thoracic surgery and.internal medicine curriculum as visual aids.This Respiratory System model separating into 7 parts. The lungs have two removable lobes to show the internal structures. The heart bisects showing atria, ventricles and valves The larynx bisects and the diaphragm is shown.
Great for school teaching tool. learning display, and collectibles, also will be a great addition to your lab supplies.Perfect tool. can be used for classroom health demonstrations and anatomy teaching aids and can also be used for children's educational toys.

Human Body Models,Lung Anatomy Model,Respiratory System Model,Human Respiratory System Model

Xinxiang Vic Science&Education Co.,Ltd. , https://www.labmedicalscience.com