H20B Mast Section Terex Comedil Tower Crane

Products Specification

Type , Model: H20B Mast Section Terex Comedil Tower Crane

Size: 1.9mx1.9mx3.75m 

Use for : Terex Comedil Tower Crane （H20A , H20B）

Materials: Q345B

Within bolts, Ladder, Platform

Process: Blasting derusting, 

Painting:  Under painting , Middle painting, Surface painting.

Our factory produce and supply almost all famous brand tower crane :Mast section, Anchor Frame, Fixing angle ,Adaptor and so on as good quality and price.

H20B Mast Section Terex Comedil Tower Crane

Tower Crane Knowledge sharing：

Case study of anti-collision safety measures for cross operation of multiple tower cranes

1. According to the characteristics of this project and the actual situation of the site, explain the case reference of anti-collision safety measures scheme for the cross operation of multiple tower cranes.

Ii. Site information: buildings 21, 22, 25 and 26 in the residential area. There are 4 series 50 tower cranes installed on site.

Three, compilation basis: on the basis of the construction engineering safety production management regulations, the tower crane safety operation procedures , the used construction machinery safety technical regulations ,

The used construction machinery safety technical regulations , the construction hoisting machinery safety supervision and management regulations , is built appoint 22 file.

Iv. Tower selection and positioning

According to the characteristics of the project and the actual situation of the site, a QT5013 jack-up tower crane shall be installed in each of the building, with a lifting height of 70M for the maximum rated lifting weight

A lifting speed of 80/40/20min, a rotary speed of 66S and a speed of 50/25m /Min for each building, and a total installed capacity of 30KW.

The bottom frame is 1.8t, tower body standard 0.8t, jacking jacket 2.4t, lower turntable 2T, upper turntable 1.5t, tower top 1.5t, top balance arm pull rod 1.5t, traction trolley 0.3t, lifting boom length 50M, balance arm length 43M, tower crane height 63M.

H20B Mast Section Terex Comedil Tower Crane

1. working conditions of the crane: the maximum working pressure of 250 n / ㎡, non-working wind 500 n / ㎡, working thermometer - 20-10, power 380 v + - 10%. See article 1 for the main performance.

2. Positioning of tower cranes: based on the actual situation of the site, engineering shape and structural features, and according to the operation instructions of tower cranes, one tower crane is installed on each floor of respectively, which will be installed by equipment installation co., LTD. For details, please refer to the floor plan

Identification and analysis of hazard sources

In the construction process, the hazard sources of special equipment are mainly reflected in the following aspects:

1) during the operation, the safety limit device of tower crane suddenly loses control, breaks the rope and causes falling objects, injury or abnormal impact, and causes major dumping or arm breakage, etc.

2) landslide toppling of foundation pit slope under external load

3) serious damage to facilities caused by natural disasters (such as thunder and lightning, sandstorm, strong electric shock wind, heavy rainfall, storm, etc.

4) death accidents occurred in the process of dismantling and jacking of tower cranes

5) electric equipment fault or serious power leakage occurs in the running line, causing electric shock accident

6) improper operation of operators, command personnel command error, causing safety hazards

H20B Mast Section Terex Comedil Tower Crane

7) during night construction, it is dangerous due to unclear sight

8) when the tower crane stops working, the position of the hook is improperly parked, causing potential safety hazards;

9) in the construction of multiple towers, the big arms of two tower cranes are improperly coordinated and collide with each other

10) collision may occur due to the close distance between the tower crane and the building on the construction site.

Vi. Technical safety measures for multi-tower construction

1. Carefully check whether all working mechanisms and safety limit devices of the tower crane are intact.

2. Pay attention to understand, observe the surrounding environment of the tower crane installation area, and select appropriate lifting machinery for installation.

3. Installation personnel must wear safety helmet, and operators on tower crane should fasten safety belt and wear non-slip shoes.

Vii. Safety technical management measures for multi-tower construction:

The distance between tower crane 1 and tower crane  2 is less than 100M (the boom length of type 63 tower crane is 50m and 56M).

The distance between tower cranes of 2 building and 3 building is less than 100M, and there is a possibility of collision between the two towers' forearms. The following anti-collision measures are adopted

1. The height difference shall be more than 5 meters during the first installation of the tower crane

2) the tower crane driver shall park the trolley in the middle of the big arm when changing shifts, and the main hook shall be closed to the upper limit.

3) in order to prevent the collision of tower cranes and the site safety and civilized construction requirements,

The height of the two adjacent tower cranes should be no less than 8M by controlling the construction progress. Unified coordination and command to ensure the safety of tower crane construction.

H20B Mast Section Terex Comedil Tower Crane

2) each tower crane shall be equipped with professional drivers and command personnel, and shall be subject to the arrangement of the project department.

 In the process of hoisting, the two tower cranes shall stagger each other to ensure the collision between the big arm and the big arm, and no contact between the big arm and the steel wire.

Viii. Safety management measures

1. The tower crane driver shall be trained and qualified by relevant departments before taking up his post with a certificate.

2. The use of tower cranes shall comply with the safety technical standards, codes and regulations for tower cranes issued by the state and competent authorities, and the relevant provisions in the operation instructions for tower cranes:

Daily check whether the foundation settlement, damage Check whether the metal structure and external structure of the tower crane are normal.

Whether all safety devices and indicating instruments are complete and effective; Whether the connecting bolt of the main part is loose Whether the abrasion of the wire rope and the wearing and winding of each pulley conform to the regulations

Whether the grounding of the tower crane and the connection between the shell of electrical equipment and the body meet the specified requirements.

Regular inspection should be carried out according to the heavy workload and the severe environment. The inspection period is initially set as once a week.

Mainly includes; The basis of the tower crane, safety protection device, hook, bolt, pin shaft loose, brake wear, wire rope wear and end of the fixed situation.

Attention should also be paid during use: empty operation should be carried out before the operation, check whether all institutions, brakes, safety devices are normal

The tower crane driver should cooperate well with the field command, and the driver should obey the emergency stop signal sent by anyone. Limit shall not be used as stop switch, lifting objects shall not be free falling

It is strictly prohibited to pull, lift and overload operation, directly hang objects with hooks and transport personnel with tower cranes.When any safety device alarms during operation, the reason shall be found out and the safety device shall not be pulled out at will. Stop operation when the wind exceeds level 6

Upon completion of the operation, switch all working mechanisms to 0, cut off the main power supply, and put warning signs on the switch box, which will be watched by special personnel

It is strictly forbidden to jump over the block and turn sharply when the tower crane operators operate each control

The lifting hook is close to the top of the boom. When the trolley reaches the limit point, it should slow down to the stop position. When lifting heavy objects for translation, they should be hung over the obstacles for more than 0.5m

After the operation, the tower crane boom should be turned downwind and the cycloidal brake should be relaxed. The trolley and balance should be moved to the non-working position.

Comedil Tower Crane

COMEDIL AC 55-3  Mast section
COMEDIL AC 60-3  Mast section
COMEDIL AC 100-4  Mast section
COMEDIL AC 100-4L  Mast section
COMEDIL AC 130-5  Mast section
COMEDIL AC 160-5  Mast section
COMEDIL AC 220-5  Mast section
COMEDIL AC 250-5  Mast section
COMEDIL AC 250-6  Mast section
COMEDIL AC 300-6  Mast section
COMEDIL AC 350-6  Mast section
COMEDIL AC 500-8  Mast section
COMEDIL AC 700-9  Mast section
COMEDIL AC 1000-9  Mast section
COMEDIL CTL-140-8  Mast section
COMEDIL CTL-180-16  Mast section
COMEDIL CTT721  Mast section
 COMEDIL CTL630  Mast section
COMEDIL CTT561-32  Mast section
COMEDIL CTL340  Mast section
COMEDIL CTL400  Mast section
COMEDIL CTT561-24  Mast section
COMEDIL CTT561  Mast section
COMEDIL CTL430  Mast section
COMEDIL CTL260  Mast section
COMEDIL CTT331  Mast section
COMEDIL CTL180  Mast section 
COMEDIL CTT231  Mast section
COMEDIL CTT191  Mast section
COMEDIL CTL140  Mast section 
COMEDIL CTL130  Mast section
COMEDIL CBR40  Mast section
COMEDIL CBR36  Mast section
COMEDIL CBR32  Mast section
COMEDIL CTT 182  Mast section

Terex Tower Crane

terex FC 6.24H  Mast section
terex CTT 91-5  Mast section
terex CTT 132-6  Mast section
terex CTT 162-8  Mast section
terex CTT 182-8  Mast section
terex CTT 191-10  Mast section
terex CTT 231-12  Mast section
terex CTT 332-16  Mast section
terex CTT 361-18  Mast section
terex CTT 361-20  Mast section
terex CTT 561A-20  Mast section
terex CTT 561A-32  Mast section
terex CTT 721-40  Mast section