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Consistent use of selected paving materials enrich the campus environment, improve its functional and aesthetic qualities, and further the campus's sustainability goals. The Paving Applications Table identifies appropriate paving materials for the Classical Core and their application for the campus's circulation system (as illustrated in the Circulation Diagram in the Site Planning Section). The Paving Materials Table summarizes key characteristics of the paving materials allowed in the Classical Core. The rest of this section discusses the paving materials, categorized as modular pavements, poured-in-place pavements, or boardwalks.
The modular paving materials recommended for Campanile Way and Sather Road enhance the pedestrian environment at this major cross-axes of the campus.
The vignette illustrates:
- Maintaining the views of neoclassical buildings along these prominent corridors.
- Planting pollarded London Plane Trees to create design symmetry along both walks and restoring foundation planting around neoclassical buildings.
- Enhancing these pedestrian walks with modular paving materials - Campanile Way pavers to be larger in scale than Sather Road pavers.
- Locating Campus Standard light fixtures in symmetrical configurations without obstructing prominent views.
- Incorporating low seat walls at the intersection, framing views to the west.
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The use of modular pavers on walks and plazas is consistent with the historical character of the Classical Core. They permit water percolation and are reusable after trenching or repairs if constructed with un-mortared joints. Modular pavers set over a pervious material improves stormwater management, reduces long-term maintenance costs and repair time, and supports the sustainability goals of the campus.
Design Intent:
- Select a method of installation based on site-specific conditions, anticipated uses, and the demands of vehicle weight loads.
- Install modular pavers over a pervious material where possible.
- Use simple edge restraints where modular paving meets adjacent soil.
Concrete or Stone Pavers
Concrete or stone pavers are the appropriate materials for pedestrian walks on campus.
Design Intent:
- Incorporate concrete interlocking pavers or stone pavers in monochromatic colors, rectangular forms, and with slip-resistant surfaces.
- Incorporate pavers with sizes appropriate in scale based on landscape context and project goals.
- Determine thickness of pavers based on functional requirements and material strength.
- In general, configure pavers in pattern perpendicular to the direction of travel.
Brick Pavers
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Design Intent:
- In all cases, incorporate brick pavers in red clay tones, with a slip-resistant surface, and size to accommodate specific functional requirements.
- In general, use red brick pavers for paving fields and borders at building entrances.
- In general, use brick pavers as accents in pedestrian plazas.
- For Campanile Way, reconstruct the gutter with red brick pavers that match the module size and color of Campanile Esplanade. Configure pavers in a stacked-bond pattern with aligned joints.
- For Sather Bridge and Campanile Esplanade, retain the historical application of red brick pavers and granite insets.
Granite Inserts
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Example of granite insets in brick paving at Campanile Esplanade (2003).
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Historically, square granite insets, in conjunction with brick paving, serve as decorative accents denoting corners in the edge bands. They serve as anchoring elements, with the benefit of minimizing the cutting of brick pavers to finish out corners.
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Design Intent:
- Where appropriate, use granite insets in conjunction with brick paving fields at building entrances to transition between the brick bands meeting at opposing angles.
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The campus uses poured-in-place paving materials as a functional, durable, and long-lasting solution for vehicular and pedestrian surfaces. Historically, the University has used poured-in-place pavements throughout the Classical Core, providing surfaces that do not compete with the richness of the neoclassical buildings and historical landscapes.
Concrete
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Example of plaza paving consisting of exposed aggregate concrete with brick bands (2003).
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Concrete paving material is often used for pedestrian walks and pedestrian plazas due to the resulting formal geometries and architectonic forms.
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Design Intent:
- At pedestrian plazas, incorporate brick paver accent bands with concrete paving in patterns that complement the historical configurations found within the Classical Core.
- Use concrete in lieu of asphaltic concrete, as appropriate, for service areas that need to withstand heavy vehicle loads.
- Always use neutral tones for concrete paving, either by adding industrial by-product material (carbon) or an integral pigment color.
- At a minimum, include carbon-black additives in natural gray concrete paving to reduce glare and reflection.
- Base the thickness of the concrete slab on a soils report and functional requirements.
- For walks, use a heavy broom finish on steeper slopes, and medium or light broom finish on flatter slopes.
- For plazas, use a sandblasted or exposed aggregate finish (see Paving Materials Table for specific aggregate materials).
- For the Mining Circle, which functions as a vehicular roadway, pedestrian walk, and plaza area, consider using concrete paving to distinguish the area as a unified public space. Provide flexibility and safety for pedestrians, while reducing the visual dominance of vehicular circulation.
Asphaltic Concrete
The use of asphaltic concrete for pedestrian paths and vehicular roads accommodates the pathways' fluid lines and diminishes their visual impact on the landscape.
Design Intent:
- Use CalTrans Standard Specifications for Type A or B asphaltic concrete with extra fines.
- Use concrete, or granite, curbs and gutters along vehicular roads where a vertical separation from pedestrian areas is needed. (extruded asphalt curbs shall not be used).
- Base the thickness of the asphalt concrete on a soils report and functional requirements.
Decomposed Granite
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Example of a decomposed granite trail leading to a wooden bridge in the natural area along Strawberry Creek (2003).
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The use of decomposed granite paving for pedestrian trails in natural areas complements the character of their setting.
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Design Intent:
- Use tan-gold quarry materials that meet sieve sizes specified in the UC Berkeley Construction Design Standards (CDS).
- Ensure paving is polymer stabilized with a finished thickness of 2-inches minimum.
- Edge trails with a wood header.
- Use decomposed granite on trails with slopes not exceeding 4% and with light expected use.
The use of boardwalks for selected trail segments along Strawberry Creek can minimize the impact to root zones of sensitive tree species and improve disabled access in a cross-sloped environment.
Design Intent:
- Construct of recycled materials, consisting of post-consumer plastic and wood waste.
- Construct on pier footings to minimize the impact on existing grades and tree roots.
- Ensure that planks are slip-resistant.
- Use planks with a natural wood grain, texture, and color.
- Where appropriate, use planks as replacement bridge decking.
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