Skip to main content

Deflection: steel or wood

For EITHER steel or wood beams, a question that asks for the allowable deflection limit (maximum) for live loads only requires which of the following equations?
A. L/240
B. L/360
C. ∆ = 5wl⁴ / 384EI
D. ∆ = 5Wl³ / 384EI

AnswerB. L/360 or span in inches divided by 360.
ARE 4.0 exam prep: SS

Note on calculations: From posted discussions on AREforum, memorization of most equations is not advised. However, even when the equation may be available in in-exam reference, selection of the appropriate equation requires correct identification.

Comments

Post a Comment

Try These Too!

Moisture content in wood

The amount of shrinkage, weight, strength, and withdrawal resistance of nails is affected by the moisture content in wood. Wood that is grademarked kiln dry has a maximum moisture content of: A. 15% B. 19% C. 25% D. 30% Answer A. 15%. Dry lumber moisture content cannot exceed 19%. ARE 4.0 exam prep: SS
Post a Comment
See the answer »

Cantilevered beam

The bending moment in a cantilevered beam is negative. Which of the following statements are true? A. the top fibers are in compression B. the bottom fibers are in compression C. rebar placement should be either at the top or the bottom D. gravity loads are not a factor for negative moment Answer B. the bottom fibers are in compression in a cantilevered beam, so top fibers are in tension which requires rebar placement at the top to resist tension. ARE 4.0 exam prep: SS
Post a Comment
See the answer »

Methods for Joining Metals

Soldering uses lead- or tin-based alloy solder filler to join two metals.  The solder filler metal melts below what temperature? Answer below 500 degrees fahrenheit or 260 degrees celsius. ARE 4.0 exam prep: BDCS
Post a Comment
See the answer »