Simple Supported Beam

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1.0 Aim

At the end of the lab session students should be able:

i. To determine the reactions of a simply supported beam

ii. To compare the experimental results with the analytical ones

2.0 Theory

A beam with a constant length and weight is said to be prismatic.When a beams weightor length (more common) varies, the member is said to be non-prismatic. Then devide

the beam into 3 part. Next we put a hook to every part of beam and we take the reading

of two weighing scales.

3.0 Apparatus/Equipment

i. A beam

ii. Two weighing scales

iii. Weights

iv. A hook

4.0 Safety Precautions


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i) Make sure the apparatus and its accessory are in good and save

condition.

ii) Make sure the workplace environment is clean and tidy.

iii) Use an appropriate safety guideline of equipment handling.

iv) Place the apparatus to its initial place.

v) Keep the workplace clean and tidy.

vi) Do a report to the lecturer if any problem occured.

5.0 Procedures

i. Place the two weighing scales on a smooth horizontal surface.

ii. Support both ends of wood beam with weighing scales as shown in

Figure 1.

iii. Mark the centre of the beam and record the mid span distance L2 .

iv. Set the reading of weighing scales to zero.

v. Using a hook hangs a weight of 2N at mid span of the beam and

record the readings on weighing scales.

vi. Repeat step 5 for the weight of 4, 6 and 8 N and record the data

obtained by completing the Table A.

vii. Mark any point on the beam and record the distance L1.

viii. Using a hook hangs a weight of 2N at a point on the beam at a

distance L1 and record the readings on weighing scales.

ix. Repeat step 8 for the weight of 4, 6 and 8N and record the data

obtained by completing the Table B.

x. Mark any point on the beam and record the distance L3.

xi. Using a hook hangs a weight of 2N at a point on the beam at a

distance L3 and record the readings on weighing scales.

xii. Repeat step 11 for the weight of 4, 6 and 8 N and record the data

obtained by completing the Table C.

xiii. Hang 3 weight of 2 N each at a distance L1, L2 and L3 and record the

readings on the weighing scales.


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6.0 Result/Data

a) Center of beam, L2 = ______________ mm

Load

(N)

Readings of Balancing

Weight (kg)Reactions (N)

Device A Device B Device A Device B2

4

6

8

Table A

b) At a point with distance L1 = ______________ mm

Load

(N)



Device A Device B Device A Device B

2

4

6

8

Table B

c) At a point with distance L3 = ___________ mm

Load

(N)




2

4

6

8

Table C

d) At a point with distance L1, L2 andL3;

Load

(N)


Weight (kg)

by Individually Load


Weight (kg)

by Simultaneously Load


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7.0 Discussion

i. Define the meaning of the reactions of a simple supported beam.

ii. Describe the values of the reactions obtained from Experiment (a), (b)

and (c) and compare to the values as calculated from theory.

iii. Describe a method of determining the reactions of a simple supported

beam when carrying three (3) loads such as shown in Figure 1. Use data

obtained in step 13 to further explain your case.

8.0 Conclusion and Recommendation

Your conclusion should be related to your practical and theoretical

understanding on the related topic.

9.0 References

Fakhrul Razi Ahmadun, Chuah Teong Guan, Mohd Halim Shah Ismail. (2005)

Safety:Principles & Practices in the Laboratory, UPM Press

Gunt Hamburg Catalogue


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Hibbeler,R.C (2004). Engineering Mechanics: Statics 3rdSI Edition.Pearson

Prentice

Hall, Singapore

Lotus Scientific (M) Sdn. Bhd. Catalogue

Simple Supported Beam

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