# Design a Construction Lift: Urgent Calculation Solution

• ryozex
In summary, the construction lift is used in a building construction project. The construction will raise building materials from ground level to any height up to 12.2m. The life will be at the top of a rigid scaffold that is not a part of the design project. The lift will raise a load up to 3kN at the rate of about 20cm/s. The load will be on a pallet (1m x 1.5m) the construction site is powered by 3 phase AC current, 460 voltage with 60 hertz electrical power supply.
ryozex
Urgent calculation: design a construction lift...

the construction lift is used in a building construction project. the construction will raise building materials from ground level to any height up to 12.2m. The life will be at the top of a rigid scaffold that is not a part of the design project. it will raise a load up to 3kN at the rate of about 20cm/s. the load will be on a pallet (1m x 1.5m) the construction site is powered by 3 phase AC current , 460 voltage with 60 hertz electrical power supply. the construction lift is used for 12 hour per day. the structure to support the life is considered to be rigid... Question 1: motor selection, speed at sychronous speed and no. of pole, power rating of motor. Question 2 Narrow section V-belts recommended to use in this design! its service factor, design power. selected output speed, belt selection, driving sheave size and driven sheave size, actual output speed , center distance , belt length , no. of belt require. Question3: a speed reducer using spur gear by using 4 gear... the gears have a 20 degree pressure angle... find the no of teeth,size of teeth as indicated by the pitches, force and torque act on teeth, velocity ratio and train value ,speed of driving gear and driven gear, center distance. Question 4: chain drive (single strand roller chain is recommended) finf its service factor,design power ,velocity ratio,required no. of teeth on each sprocket, actual output speed, chain lenth,center distance, chain no and type of lubrication... please help me slove this problem... Thx a lot~

Welcome to Physicsforums!

Unfortunately, that's about as much of the kid gloves as you get. This isn't DoMyHomeworkForMeforums.com; you need to show us your thinking / work on these questions so we can guide you along. Secondly, homework more properly belongs in the homework subforums (where this question may be moved if a mod comes along and deigns to do so).

actually this is nt my homework...
i juz do it for my extra knowledge only...
my lecture never ask us to do homework de...cos i think he also dun know how to do...-.-!
when i take this question to ask him, he juz say exam will nt come out this type of question...so no need to do it... >.<
i have try it by using my textbook.
but those question in my textbook always got sufficient information to solve those calculation...
In the 1st question...
i had choose 3phase AC motor with NEMA design D due to the information state at my book... but my book din say how to find what power rating that need to use..
beside the speed of synchronous speed is calulate by (120f/p).
the p=no. of pole of the motor...
so how many pole should i choose...
for the other question,
because the given output speed in question is 20cm/s and the textbook that i read use the output speed in the unit (rad/s)
so how should i convert it??
i hope got ppl can help me solve this problem...
because i dun know where can help me if find the solution from net also can't solve...

## 1. How do you design a construction lift?

Designing a construction lift involves careful calculation and planning. The first step is to determine the required lifting capacity and height to ensure it can safely transport materials and workers. Next, the type of lift (scissor, boom, etc.) must be chosen based on the specific construction needs. The design also includes considerations for safety features, such as emergency stop buttons and overload protection.

## 2. What factors should be considered when designing a construction lift?

There are several important factors to consider when designing a construction lift. These include the lifting capacity, height requirements, type of lift, power source, safety features, and environmental conditions. It is also crucial to follow all relevant safety regulations and standards to ensure the lift is safe for use.

## 3. What is an urgent calculation solution for a construction lift?

An urgent calculation solution for a construction lift is a quick and accurate method for determining the necessary specifications for the lift. This typically involves using advanced engineering software to calculate factors such as weight capacity, structural stability, and power requirements. It is essential to have an urgent calculation solution in case of unexpected changes or emergencies during the construction process.

## 4. How can a construction lift be made more efficient?

One way to make a construction lift more efficient is to use advanced technology and automation. This can include features such as remote control operation, automatic leveling, and energy-saving mechanisms. Proper maintenance and regular inspections can also help ensure the lift is functioning at its best and reduce downtime.

## 5. Are there any safety precautions to consider when using a construction lift?

Yes, there are several safety precautions to consider when using a construction lift. First, only trained and authorized personnel should operate the lift. It is also crucial to follow all safety guidelines and instructions provided by the manufacturer. Regular maintenance and inspections are also necessary to ensure the lift is in good working condition. Finally, proper use of personal protective equipment (PPE) is essential for anyone working near or on the lift.

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