A pretensioned beam is prestressed using 5mm diameter wires, τ bp = – McqOptions

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1.	A pretensioned beam is prestressed using 5mm diameter wires, τ bp = 7.42, ϕ = 0.00725, Lt = 485mm. Calculate the bond stress at l/4 and l/2 the transmission length from the end?
A.	3.7n/mm2 and 1.82n/mm2
B.	2.2n/mm2 and 5.8n/mm2
C.	4.8n/mm2 and 10.5n/mm2
D.	1.5n/mm2 and 7.4n/mm2
Answer» B. 2.2n/mm2 and 5.8n/mm2

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