You want to design a bridge model with minimal supports. Which combination of design choices best achieves this?

hard📝 Application Q15 of 15

3D Printing - Support Structures

AMake the bridge span a flat horizontal beam with thick walls

BUse arches for the bridge span and split the model into two parts with gentle slopes

CDesign the bridge as one solid piece with vertical walls and sharp overhangs

DAdd hollow cavities under the bridge span without changing angles

Step-by-Step Solution

Solution:

Step 1: Identify self-supporting shapes
Arches naturally support themselves and reduce the need for supports in bridges.
Step 2: Combine splitting and gentle slopes
Splitting complex models and designing gentle slopes under 45 degrees further reduce supports.
Step 3: Evaluate other options
Flat beams with thick walls or sharp overhangs increase supports; hollow cavities alone don't reduce supports if angles remain steep.
Final Answer:
Use arches for the bridge span and split the model into two parts with gentle slopes -> Option B
Quick Check:
Arches + splitting + gentle slopes = minimal supports [OK]

Quick Trick: Combine arches and gentle slopes, split parts to minimize supports [OK]

Common Mistakes:

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