Lesson 1: Understanding Load Input
Lesson 2: Beams - Geometry and Material Properties and Load Input
Lesson 3: Bearing Design
Lesson 4: CLT Design
Lesson 5: Lateral Stability
Lesson 6: Concept Mode
Course Summary
Lesson 3 Assessment
Difficulty Level: 1/5
Estimated Time to Complete: 15 minutes
Problem Statement: Joist Bearing Length Design
The goal of this assignment is to determine the minimum bearing length required for single-span floor joists based on the given structural loading conditions and material properties.
Given Data:
- Joist Type & [Grade]: S-P-F sawn lumber [No.1/No.2]
- Joist Size: 38 × 184 mm
- Joist Span: 3.0 m
- Joist Spacing: 400 mm (center-to-center)
- Specified Dead Load: 1.5 kPa (includes partitions)
- Specified Live Load: 2.4 kPa (commercial use and occupancy)
- Load Duration: Standard
- Service Condition: Dry
- Lateral Support: Fully supported by 15.5 mm Douglas fir plywood (DFP) subfloor, field-glued to joists
- Floor System Type: Case 2
Design Requirement:
Use the software to determine the minimum bearing length required at the supports, considering the compression perpendicular to grain capacity of S-P-F No.1/No.2 lumber to ensure structural adequacy under the applied loads.
Question 1
Select the most appropriate answer based on the software output and standard design requirements.