What is the minimum concrete cover for the reinforcing steel

Assignment Help Other Engineering

Reference no: EM13896193

1. A W12x40 beam is heated to 760°C. Answer the following questions.

What is the W/D factor for sprayed protection?

What is the W/D factor for box type protection?

What is the specific heat of the steel?

What is the thermal conductivity of the steel?

What is the yield strength of the steel assuming it was 36,000 psi at ambient conditions?

2. Using the unprotected steel member in question 1, build a spreadsheet to do the step by step method for estimating the temperature of unprotected steel work exposed to the ISO 834 Standard Fire. Assume a convective heat transfer coefficient of 25 W/m2K and an emissivity of 0.5. Assume the specific heat to remain constant at 600 J/kgK. Use a time step of 30 seconds and an ambient temperature of 20°C. The column is exposed to fire on all four sides. Provide temperatures of the steel member at the following times:

a. t=5 mins
b. t=10 mins
c. t=30 mins
d. t=60 mins

3. What is the fire resistance provided by three layers of 5/8" Type X drywall encasing a W10x45 steel column?

4. Assume you have a restrained siliceous concrete column (f'c=4,000 psi). It needs to have a fire resistance of 2 hours. Answer the following:

a. What is the minimum concrete cover for the reinforcing steel?
b. What is the minimum dimension of the column?

5. Using AFPA's values for β, calculate the residual cross sectional area (in in2) of an 10"x10" wood timber exposed to fire on all 4 sides and exposed to a standard fire for a period of 2 hours.

6. What is the fire resistance rating of a 10"x10" wooden interior column? Assume the column is loaded to 60% of its capacity, its height is 14', and the Ke value is equal to 1.0.

Reference no: EM13896193

Questions Cloud

Why there is a tendency towards underprovision of a network : Explain why there often exist multiple consumer equilibria for a given price of the network industry. Explain why there is a tendency towards underprovision of a network good by a monopolist, and even by perfectly competitive firms.

Do the authors'' arguments support their main points? : Do the authors' arguments support their main points?

Hiker company completes the following transactions : Hiker Company completes the following transactions during the current year.

Define direct and indirect network effects : What are the effects of end-user piracy of digital products on the producers' choices and on social welfare? Discuss. Define direct and indirect network effects, and illustrate with examples.

What is the minimum concrete cover for the reinforcing steel : What is the minimum concrete cover for the reinforcing steel and what is the minimum dimension of the column?

What do we call the error of accepting a false hypothesis : What do we call the error of accepting a false hypothesis? Of rejecting a true hypothesis and What symbol is usually used for the probability of type I error? What is another name for this?

What are the environmental health issues : There have been reports of people getting sick on cruise ships. What are the environmental health issues that must be addressed on a cruise ship in order to protect the health of the people on board

Some of the philosophies that influenced latin america : What are some of the philosophies that influenced Latin America? In what way did they impact the cultures of Latin America?

What is the meaning of the tragedy of the anticommons : Does a firm have incentives to license its innovation to rival firms? Discuss. What is the meaning of the ‘tragedy of the anticommons'? How does this problem apply to innovations and how can it be mitigated?

User Account

All Pages