STANDARDS FOR HOUSING
DESIGNAND CONSTRUCTION
Relevance/Applicability in View of “New Normal”
A presentation
by Ar. Maria Benita O. Regala. fuap
Manager, Housing Technology Development Office (HTDO), NHA
to the Technical Workshop on Holistic Solutions for Resilient Low-Cost Housing
at The Oracle Hotel, Quezon City
on 03 April 2014
OUTLINE OF PRESENTATION
• Standards from BP 220
• Site Selection Criteria and Planning Principles
being applied for NHA Projects
• 22 m² Row House Model with 11 m² Loft
developed as a disaster-resilient housing
2
BP 220 Standards
A. Site Criteria (Sec. 5, BP 220)
1. Availability of Basic Needs (Water, Movement
and Circulation, Storm Drainage, Solid and Liquid
Waste Disposal, Parks/Playground, Power)
2. Conformity with Zoning Ordinances/ City or
Municipality Land Use Plan
3. Physical Suitability
4. Accessibility
3
BP 220 Standards
B. Planning Considerations (Sec. 5, BP 220)
1. Area Planning
2. Site Preservation/ Alteration
a. Slope
b. Preservation of Site Assets
c. Ground Cover
3. Easements
4. Circulation
4
BP 220 Standards
B. Design Parameters (Sec. 5, BP 220)
1.
2.
3.
4.
5.
6.
7.
Land Allocation
Lot Requirement
Length of Block
Shelter Component
Setback/ Yard
Water Supply
Electrical Power Supply
8.Sewage Disposal System
9. Drainage Disposal System
10. Garbage Disposal System
11. Firefighting
5
SITE SELECTION CRITERIA
• LOCATION
– With consideration of both the regional and local
context
– Housing projects shall be within suitable sites for
housing and outside potential hazard prone and
protection areas
• ACCESSIBILITY FROM MAJOR TRANSPORTATION
FACILITIES
– Site shall have an existing legal road right of way from
a major thoroughfare
6
SITE SELECTION CRITERIA
• ZONING AND LAND USE CLASSIFICATION
– Classification shall be Residential as defined under
approved CLUP
• TOPOGRAPHY AND SOIL CHARACTERISTICS
– Must be relatively flat (or filling requirement for
rolling terrain shall not exceed max cost)
– Slopes should not exceed 15% max gradient. For high
density, slope should be below 5%.
– Soil characteristics must conform to the suitability
standards for construction by DENR through its
Bureau of Mines and Geo-Sciences
7
SITE SELECTION CRITERIA
• WATER SUPPLY FACILITIES
– Source of potable water should be established
whether from local water company, from the ground,
or other alternative source
• POWER SUPPLY FACILITIES
– Presence of power utility company that will serve the
needs of new community
• DRAINAGE
– Natural waterways and outfalls shall be established on
ground
8
SITE PLANNING PRINCIPLES
• Compliance to all existing laws, rules and
regulations on housing (local or national)
• Adoption of the green infrastructure and
preservation of existing natural assets of the land
(e.g., trees, ground cover, vegetation, natural
waterways)
• Promotion of “walkable communities”
9
SITE PLANNING PRINCIPLES
• Promotion of appropriate community facilities
and infrastructure
– To serve the socio-economic needs and cultural
activities of the beneficiaries as well as encourage
the implementation of environmental
management programs in the housing sites
– NHA shall provide the minimum requirements for
community facilities
10
SITE PLANNING PRINCIPLES
• LAND USE ALLOCATION PER SITE
66% Saleable
– Residential housing development
34% Non-Saleable
– Circulation/ Road Network
– Parks and Playgrounds
– Community Facilities
11
SITE PLANNING PRINCIPLES
• LAND USE ALLOCATION PER SITE
66% Saleable
– Residential housing development
34% Non-Saleable
– Circulation/ Road Network
– Parks and Playgrounds
– Community Facilities
12
SITE PLANNING PRINCIPLES
• MAXIMUM ALLOWABLE DENSITY PER HECTARE
– Horizontal Development
• 1-Storey Row House (Loftable) : 160 units/ha.
• 1-Storey Row House (with loft) : 160 units/ha.
• 2-Storey Row House
: 160 units/ha.
– Vertical Development (Low Rise Buildings)
•
•
•
•
2-Storey LRB
3-Storey LRB
4-Storey LRB
5-Storey LRB
: 225 units/ha.
: 245 units/ha.
: 325 units/ha.
: 405 units/ha.
13
HOUSING UNIT DESIGN GUIDELINES
• MINIMUM FLOOR AREA
– 22.0 square meters loftable
– 22.0 square meters with 11 sq.m loft
– 24.0 square meters (for LRBs)
HIGHER THAN
BP 220 MINIMUM
– Models for lots along major roads may be modified to
include provision of a space for home-based economic
activity, but should not exceed cost parameters
– If new technology or material substitute: must have
passed AITECH (Accreditation of Innovative
Technologies for Housing)
14
STANDARDS FOR COMMUNITY FACILITIES
• Provision of community facilities shall be
determined based on the needs of target
beneficiaries
– Based on existence of public infrastructure within the
5-km radius of the site
• For horizontal development:
–
–
–
–
1 covered basketball court/ multi-purpose center
1 day care center w/ 2 classrooms
1 MRF
1 tricycle terminal
15
OTHER FACTORS IN PROJECT PLANNING
Factors that Help Ensure Effective Project Planning
and Management for Disaster Resilient Homes:
Local Inter-Agency Committee
with POs and NGOs organized at
the start of the project
Securing of all Environmental
Clearances and Permits prior to
construction:
*ECC from DENR
*Clearance from PHIVOLCS
*Dev’t/ Building Permit from LGUs
A Planning Team and a Project
Management Composite Team were
set up by NHA
Community Representatives were
made part of project monitoring
during and after construction
Individual beneficiaries accept
their housing units prior to
payment to Contractors
16
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
LOT SIZE:
40 sq. m.
(10.00m x 4.00m)
BUILDING
FOOTPRINT:
22 sq. m.
(5.50m x 4.00m)
REVISED 06 MAR 2014
TOTAL FLOOR AREA: 33 sq. m.
(GROUND FLOOR AND LOFT)
17
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
DISASTER RESILIENT HOUSING STRUCTURAL DESIGN STANDARDS
DESIGN PARAMETER
ONE-STOREY
TWO- STOREY
3-STOREYS OR
MORE
WIND LOAD
250 KPH
250 KPH
250 KPH
STRENGTH OF WALL
AND
SUPERSTRUCTURE
3,000 PSI
3,000 PSI
3,000 PSI
SOIL BEARING
CAPACITY
95 KPA
95 KPA
95 KPA
SEISMIC LOAD
ZONE 4
ZONE 4
ZONE 4
LOADINGS
50 PSF
50 PSF
50 PSF
FIRE RESISTANCE
2 HOURS
2 HOURS
2 HOURS
This is one of the outputs generated from the consultation meetings of the
NHA TWG on Disaster-Resilient Housing in November to December 2013.
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
PROPOSED LOT SIZE:
40 sq. m. (10.00m x 4.00m)
SITE DEVELOPMENT PLAN
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
GROUND FLOOR AREA
22 sq. m. (5.50m x 4.00m)
GROUND FLOOR PLAN
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
LOFT FLOOR AREA
11 sq. m. (2.75m x 4.00m)
LOFT FLOOR PLAN
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
CROSS SECTION
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
LONGITUDINAL SECTION
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
FRONT ELEVATION
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
REAR ELEVATION
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
FRONT ELEVATION
TYPHOON SHUTTER DETAILS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
SECTION
SIDE
ELEVATION
TYPHOON SHUTTER DETAILS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
WINDOW SILL DETAILS
TYPHOON SHUTTER DETAILS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
CONCRETE GUTTER DETAIL
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
INCLINED ROOF BEAM DETAILS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
PURLIN EMBEDMENT DETAILS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
ROOFING SHEETS
OVERLAP DETAIL
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
OUTLINE SPECIFICATIONS
STRUCTURAL
: RC BEAM, COLUMN & FOOTING
RC WALL FOOTING
RC FLOOR SLAB, 100MM thk. WITH 10mmØ
RSB @ 400mm BOTHWAYS
WALLS
: 150mm thk. CHB (FIREWALL)
100mm thk. CHB, PLASTER FINISH (EXTERIOR)
100mm thk. CHB, TOOL JOINT FINISH (INTERIOR)
ROOFING
: 0.404mm thk CORR. G.I. ROOFING SHEETS at 8’
2.0mm X 50mm X 150mm C-PURLINS WITH
12mmØ SAGROD @ MIDPOINT
DOORS(OPTIONAL)
: 1 – FLUSH DOOR TYPE
1 – PANEL DOOR TYPE
1 – PVC DOOR TYPE
WINDOWS (OPTIONAL) : ALUMINUM JALOUSIE TYPE with TYPHOON SHUTTERS
: 4” x 8” x 8” CONCRETE LOUVER BLOCKS
FINISHES
: EXTERIOR WALL – PLASTERED AND PAINTED FINISH
T & B FLOOR – 200mm X 200mm FLOOR TILES
PLUMBING
: WATER LINE – uPVC PIPES
SANITARY & DRAINAGE LINES – PVC PIPES
TOILET BOWL – PAIL FLUSH TYPE LAVATORY
SEPTIC TANK
: PURIFYING POLYTHYLENE SEPTIC TANK
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
INCREASE SIZE OF REINFORCING STEEL
BARS FROM 12 mm ø
TO 16 mm ø DIAMETER
INCREASE BEAM WIDTH FROM 150mm
to 175mm
STRUCTURAL DRAWINGS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
DPWH COMMENTS AND RECOMMENDATIONS
INCREASE SIZE OF LOFT WOODEN FLOOR
JOISTS FROM 2” x 3” to 2” x 6”
INCREASE COLUMN WIDTH FROM
150mmto 175mm
STRUCTURAL DRAWINGS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
DPWH COMMENTS AND RECOMMENDATIONS
CHANGE ROOFING SCREWS FROM
TEKSCREW TO J-BOLT
STRUCTURAL DRAWINGS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
DPWH COMMENTS AND RECOMMENDATIONS
INCREASE FLOOR TO FLOOR HEIGHT TO
ACCOMMODATE LARGER FLOOR JOIST
AND BEAM (FROM 5.30M TO 5.50M)
REVISED STAIR RISER HEIGHT TO
ACCOMMODATE LARGER FLOOR JOIST
AND BEAM
ARCHITECTURAL DRAWINGS
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
COMPARATIVE ANALYSIS
22 sq.m.
LOFTABLE
ROWHOUSE
COST
Php 125,000.00
TOTAL FLOOR AREA 22sq.m.
COST PER SQ. M.
Php 5,681.81
22 sq.m.
ROWHOUSE
WITH LOFT
Php 219,723.63
33 sq.m.
(22 sq.m. G/F AREA
and 11 sq.m. LOFT)
Php 6,658.29
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
COMPARATIVE ANALYSIS
22 sq.m. LOFTABLE
ROWHOUSE
22 sq.m. ROWHOUSE
WITH LOFT
Architectural Features
Structural Provision
for Loft and Stairs
Loft, Stairs, Wooden
Typhoon Shutters
G/F Floor to Loft
Floor Finish Height
2.40 meters
2.60 meters
Gutter
No Gutter and
Downspout
Concrete Gutter
(3 inches thick) and
Downspout
Height of Firewall
4.80 meters
5.80 meters
Roof Thickness
0.30millimetersthk.
Corrugated GI Sheet
0.40millimetersthk.
Corrugated GI Sheet
Roof Purlins
1.2 x 100 x 50 mm
2.0 x 150 x 65mm
ARCHITECTURAL
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
COMPARATIVE ANALYSIS
22 sq.m. LOFTABLE
ROWHOUSE
22 sq.m. ROWHOUSE
WITH LOFT
STRUCTURAL
Column Size
200 x 150 mm, with
250 x 175 mm, with
4-12 mm ø reinforcing 4-16 mm ø reinforcing
bar
bar
Beam Size
B-1: 250 x 150 mm,
with 4-12 mm ø
reinforcing bar
B-1 and B-3:
300 x 175 mm and
B-2: 250 x 175 mm,
with
4-16 mm ø reinforcing
bar
Footing Size
400 x 400 mm
800 x 800 mm
Wall Footing Size
300 mm
400 mm
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
COMPARATIVE ANALYSIS
22 sq.m. LOFTABLE
ROWHOUSE
22 sq.m. ROWHOUSE
WITH LOFT
ELECTRICAL
Number of Lighting
Outlets
3
4
Number of
Convenience Outlets
3
4
Number of Switches
2
2
Service Entrance
2-5.5 mm² ø THW +
1-3.5 mm² ø TW in 20
mm ø PVC CONDUIT
2-5.5 mm² ø THHN +
1-5.5 mm² ø THHN
(G) in 20 mm ø RSC
CONDUIT
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
MATERIAL
COST
DESCRIPTION
LABOR COST
ESTIMATED TOTAL INDIRECT
TOTAL COST
DIRECT COST
COST
I. EARTHWORKS
SUB-TOTAL
2,418.00
1,943.63
4,361.63
610.63
4,972.25
SUB-TOTAL
65,420.75
19,135.65
84,556.41
11,837.90
96,394.30
SUB-TOTAL
3,460.00
720.78
4,180.78
585.31
4,766.09
SUB-TOTAL
16,105.00
3,952.28
20,057.28
2,808.02
22,865.30
SUB-TOTAL
13,000.00
1,741.89
14,741.89
2,063.86
16,805.75
SUB-TOTAL
7,008.00
1,321.43
8,329.43
1,166.12
9,495.55
SUB-TOTAL
14,557.32
4,805.39
19,362.70
2,710.78
22,073.48
SUB-TOTAL
12,881.00
4,127.43
17,008.43
2,381.18
19,389.61
SUB-TOTAL
17,880.74
2,260.76
20,141.49
2,819.81
22,961.30
II. CONCRETE/STRUCTURAL WORKS
III. FORMWORKS
IV. ROOFING WORKS
V. DOORS AND JAMBS
VI. WINDOWS
VII. PLUMBING WORKS
VIII. ELECTRICAL WORKS
IX. ARCHITECTURAL WORKS
TOTAL
152,730.81
40,009.22
192,740.02
26,983.60 219,723.63
22 SQ. M. ROW HOUSE MODEL FOR TYPHOON
YOLANDA VICTIMS (WITH 11 SQ. M. LOFT)
DPWH NOTES
• THE DPWH APPROVAL OF THE PLAN IS BASED ON
THE REVIEW OF DESIGN CONCEPT AND DESIGN
ANALYSIS SUBMITTED BY NHA.
• CLOSE SUPERVISION DURING CONSTRUCTION
SHOULD BE UNDERTAKEN BY NHA TO ENSURE
COMPLIANCE TO THE APPROVED PLANS.
• SUFFICIENT TESTING OF MATERIALS SHOULD BE
CONDUCTED TO VERIFY COMPLIANCE TO STANDARD
DPWH STANDARDS.