In: Civil Engineering
Deflection tests were conducted on a steel joist and a timber
joist both simply supported over
a span of 5 m and carrying a point load of 45 kN at distance of ‘a’
from left support. Maximum
deflection was observed at a position 2.4 m from the left support
for steel joist and 1.85 m from
the left support for steel joist. Calculate and compare the results
for maximum deflection, slope at
both ends and deflection under the load for both steel and timber
joists. Take Flexural rigidity for
steel joist as 14 x 1012 Nmm2 and the Flexural rigidity for timber
joist as 6.9 x 1012 Nmm2. Suggest
the changes to be made in the dimensions of the beam for reducing
the deflection based on the
results obtained.