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Eureka Valley Branch Facilities Survey

Image of Eureka Valley Branch Library
BACKGROUND
Year Built: 1961
Architect: Appleton & Wolfard
Seismic Hazard Rating 3
Number of Stories One
Type: Modern
Address: 1 José Sarria Court
(formerly 3555 16th Street)
Gross Sq. Ft.: 5,610

PRELIMINARY ASSESSMENT

The recommended modernization plan is to renovate and expand the existing building while minimizing the risk associated with a major earthquake. The recommended seismic strengthening will include foundation improvements, new steel braced or moment frames, new concrete or concrete block walls, plywood sheathing and anchors at both high and low roof, and exterior wall glass replacement. This seismic strengthening work scope directly triggers work associated with disabled access, code improvements and environmental hazard mitigation.

The building has two separate roof levels. A high roof consists of wooden joists spanning between steel beams which are supported by steel columns spaced along a concrete block wall on one side, and a series of independent footings on the other. A lower roof is constructed of plywood sheathing over 2x joist supported by steel columns or concrete block walls. The building envelope consists of glass walls, masonry walls and masonry piers.

New or alteration construction must meet state (Title 24) and federal (Americans with Disabilities Act) guidelines. The disabled access project scope for this library focuses on construction work resulting in path of travel and health and safety improvements. Existing restrooms will be reconfigured and new restroom may be added.

The anticipated building code impacts involve updating the building to comply with current life safety related code requirements for existing heating, ventilation, plumbing, electrical, lighting and other control systems. The existing heating system will be evaluated for possible replacement or expansion.

Current law requires removal of Asbestos containing Materials (ACM's)- e.g., plasterboard walls, vinyl flooring, and roofing- related to the anticipated construction activities associated with seismic retrofit, disabled access and renovation work. The removal of ACM's will require relocation of the building occupants to avoid potential health risks. Lead that is impacted will also be removed.

The recommended modernization plan incorporates expansion of the building. The new space will be used for a meeting/program room, public restrooms, computer/study area, and shelving for collection expansion. The existing staff areas will be redesigned to improve the efficient use of space. Additional data/electrical outlets will be provided. The fireplace may be removed. Landscape redesign, including additional exterior lighting, remove trellis, redesign front area (around flagpole).

ASSESSMENT DETAIL



SEISMIC

  1. There is inadequate shear transfer from the high roof to the low roof diaphragm.
  2. Existing plywood shear walls and masonry walls do not have sufficient shear capacity for lateral loads.
  3. Existing plywood shear walls do not have hold-downs.
  4. Existing masonry walls are not anchored to the horizontal diaphragms.
  5. Existing east wall is offset from its foundation wall below.
  6. Site has high ground settlement potential per HLA report.

Non-Structural Deficiencies

  1. Suspended ceilings and ceiling supported lighting are not adequately braced.
  2. Masonry chimney is not anchored to the roof.
  3. Shutoff devices are not provided at building utility interfaced to shut off the flow of gas, high temperature energy, etc., in the event of earthquake induced failure.
  4. Bookshelves and water heater are inadequately braced.

PRELIMINARY RECOMMENDATIONS

  1. Add new concrete shear walls and footings as indicated on plans.
  2. Add plywood to the existing shear walls.
  3. Install hold-downs at plywood shear walls as indicated on plans.
  4. Add hold-downs to anchor RCMU walls to the horizontal diaphragms.
  5. Add steel frame and framing anchors to prevent cross-grain bending of wood as indicated.
  6. Add steel strap for chord connections.
  7. Brace ceilings over public egresses.
  8. Anchor chimney to the roof structure.
  9. Install shut-off devices for high-energy utility lines.
  10. Brace light fixtures, boiler, water heater and freestanding book stacks.

ACCESSIBILITY

  1. Existing Service counters are not accessible.
  2. Existing toilets are not accessible.
  3. Existing path of travel needs to be upgraded.

PRELIMINARY RECOMMENDATIONS

  1. Install new accessible service counters.
  2. Renovate toilets to make them accessible. Install new toilet fixtures.
  3. Provide an accessible path of travel.

MECHANICAL

  1. Existing boiler is old and inefficient.
  2. Air circulation is very poor.
  3. Need to replace water heater.

PRELIMINARY RECOMMENDATIONS

  1. Install new boiler.
  2. Upgrade forced air ventilation system.
  3. Install new water heater and water pipes.
  4. Provide continuous ventilation in all restrooms.

ELECTRICAL

  1. The electrical system needs to be upgraded.
  2. Some of the telephone and network equipment needs to be bonded to the grounding electrode.
  3. Lack of data/electrical outlets.

PRELIMINARY RECOMMENDATIONS

  1. Install a new sub-panel from the main service panel with surge protector and integral RFI/EMI filtering to protect sensitive loads such as computers and any new electronic equipment in the building.
  2. Segregate power, clean power for computer system and separate power for all others.
  3. Replace existing light fixtures with new energy saving fixtures.
  4. The telephone and network protectors should be bonded to the incoming water line within 5 feet of its building entry.
  5. Install additional data/communication outlets.

LIFE SAFETY/SECURITY

  1. Need fire alarm and smoke detectors.
  2. Not enough exiting signs in the building.
  3. Need emergency lighting in case of power failure or in emergencies.
  4. Need additional fire extinguishers in the building.
  5. Not enough lights in and around the building.
  6. Existing window and door grilles need to be replaced.

PRELIMINARY RECOMMENDATIONS

  1. Install new smoke detectors and fire alarm.
  2. Install new exit signs and emergency lights.
  3. Install new fire extinguishers at strategic locations in the building.
  4. Install new burglar alarm system.
  5. Install new interior and exterior security lights.
  6. Install new security window and door grilles.

MATERIALS MITIGATION

  1. Asbestos Containing Materials (ACM’s) are identified throughout the building.

PRELIMINARY RECOMMENDATIONS

  1. Where impacted by construction, abate asbestos in the wall and ceiling sheetrock joint compound, wall plaster, transite pipes, ceramic tile grout, window/door caulking and, gray roof patch tar.
  2. Abate asbestos if found in the hot water piping and fitting insulation.
  3. Lead that is impacted by construction shall also be mitigated.

MODERNIZATION

  1. With the seismic retrofit work, valuable library floor space will be lost.
  2. Very small staff work and storage areas.

PRELIMINARY RECOMMENDATIONS

  1. Improvements will include expansion of the building to accommodate the increased public use of library and much needed staff work area.
  2. The staff area will be redesigned to function more efficiently.

LANDSCAPING

  1. Landscaping around the building is well maintained and needs to be restored after construction.

PRELIMINARY RECOMMENDATIONS

  1. Develop a landscape protection, restoration, and maintenance plan.
  2. Upgrade lawn sprinkler system.
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