According to the IBC, what is the maximum allowable floor area per story for a Type IIB construction office building (Business Group B occupancy) without sprinklers?
Correct Answer
B) 23,000 square feet
Per IBC Table 506.2, Type IIB construction for Group B occupancy allows 23,000 square feet per story without sprinklers.
Why This Is the Correct Answer
Per IBC Table 506.2, Type IIB construction with Group B (Business) occupancy allows a maximum of 23,000 square feet per story when the building is not sprinklered. Type IIB is non-combustible but unprotected (no fire-resistance-rated members), and the 23,000 sq ft limit reflects that lower level of inherent fire resistance.
Why the Other Options Are Wrong
Option A: 37,500 square feet
37,500 square feet corresponds to a higher construction type (such as Type IA or IB) with superior fire resistance, or applies when the building is fully sprinklered. It significantly exceeds the Type IIB unsprinklered limit.
Option C: 28,500 square feet
28,500 square feet is not the value listed in IBC Table 506.2 for this construction type and occupancy combination. It may represent a sprinklered Type IIB building or a different occupancy group.
Option D: 19,000 square feet
19,000 square feet is below the allowable limit for Type IIB/Group B. It might be associated with a lower construction type (e.g., Type IIIB or VA) or a more hazardous occupancy group.
Memory Technique
For Type IIB + Group B (office) unsprinklered: think '23K = IIB non-protected.' The 'B' in both Type IIB and Group B might help you lock in 23,000. If sprinklers were added, the number would jump significantly.
More NASCLA Questions
Which AIA document contains the general conditions that govern the rights and responsibilities of all parties in a construction contract?
A construction company has direct labor costs of $85,000, direct materials of $120,000, and overhead costs of $45,000 for a project. What is the total job cost?
What is the primary purpose of job cost accounting in construction?
A construction company has current assets of $350,000 and current liabilities of $280,000. What is the company's working capital?
In CSI MasterFormat, which division covers earthwork and site preparation?
In a mechanical drawing, what does 'CFM' typically measure?
In CSI MasterFormat Division 08, which of the following would typically be included?
On a mechanical plan, what does the symbol 'RTU' typically indicate?
What is the minimum preheat temperature for welding ASTM A992 steel when the ambient temperature is 15°F?
A general contractor's balance sheet shows total assets of $850,000, current liabilities of $320,000, and long-term debt of $180,000. What is the company's equity?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass