1.DLSU-CES BRIDGE Building Contest SY 2009-2010 Technical Guidelines

2. Truss Bridge Competition 3. Bridge Specifications

Design atruss bridgethat will be laid on two smooth supports with a span length(S) of 560 mm .

The bridge must satisfy the following specifications. (Refer to the figures)

• 560 mm Length (L) 770 mm

• Width (B) 140 mm

• Height ofTruss (H) 100 mmfrom the flat surface of the deck to the top

• Depth (D) 50 mmfrom the support surface to the flat surface of the bridge deck

• H + D 150 mm

• Weight (W) 1.50 kg

4. TRUSS Bridge Specs Weight, W 1.50 kg H+D150mm Length, L 770 mm Height H 100 mm Span Length, between UTM supports S = 560 mm UTM Support Provide a 60 mm minimum flat bearing surfaceat the supported points(see sample bridges) Bridge Deck Width B140 mm Top of UTM Depth D 50 mm 5. Sample Bridge Design A H L S D 6. Sample Bridge Design A H+D 150mm 7. Sample Bridge Design B H L S D 8. Sample Bridge Design B H+D 15 0 mm D 50 mm H 100 mm 9. Other Requirements

No portion of the bridge structure shall extendbelowthe support surfaces.

The bridge structure shall besymmetricalabout its longitudinal and transverse centerlines.

The bridge must have asmooth surfacefor the bridge deck where atoy vehicle must be able to move.

10. Materials and Construction

The bridge must be constructed using plainpopsicle sticks only .

The popsicle sticksmay be cut or sandedin any manner.

Onlyall purpose glue(white) must be used to connect the popsicle sticks.

No other materialsmust be used.

Do not paint, coat or stainthe bridge with any foreign substance.

11. Sample Bridge L = 700 mm, H = 200 mm, B = 130 mm,W = 1.26 kg 12. Pre-Qualification Screening

• REASONS FOR DISQUALIFICATION

• Not aTruss Bridge

• No flat surface on bridge deck where a toy car may pass

• Does not satisfy minimum required bridge span length (S)

• Exceeds the maximum total length (L)

• Exceeds the maximum height (H)

• Exceeds the maximum width (B)

• Exceeds the maximum depth (D)

• Exceeds H+D limit of 150 mm

• Exceeds the maximum weight (W)

• Other materials (paint, coating, etc) aside from popsicle sticks and glue used

• Portions of the bridge extend below the supports

13. Weight , W