LUDI Engineering Services

a four-panel infographic illustrating the relationship between the width of a staircase and its capacity for people to pass one another comfortably. It uses a clean, architectural aesthetic with concrete stairs and neutral-toned clothing.

PANEL 1 (TOP LEFT): SINGLE LANE
• Capacity: 1 person.
• Stair Width: 0.90m.
• Visual: A man is walking down the center of a narrow staircase. The space is sufficient for one-way traffic but would likely require one person to pull over or turn sideways for another to pass.

PANEL 2 (TOP RIGHT): TWO-WAY TRAFFIC
• Capacity: 2 people.
• Stair Width: 1.30m.
• Visual: A woman is walking down while a man is walking up. The increased width allows two people to pass each other comfortably without physical contact or significantly breaking their stride.

PANEL 3 (BOTTOM LEFT): GROUP FLOW
• Capacity: 3 people.
• Stair Width: 1.80m.
• Visual: A couple is walking up side-by-side on the left, while a woman walks up on the right. This width suggests enough room for a small group to stay together while still leaving a "lane" open for others.

PANEL 4 (BOTTOM RIGHT): HIGH VOLUME
• Capacity: 4 people.
• Stair Width: 2.10m.
• Visual: Multiple individuals are using the stairs simultaneously, including a man carrying a child. There is ample room for two-way traffic where multiple people can walk abreast in either direction.

KEY OBSERVATIONS
• Persona vs. Person: The text uses the term "personas" (Spanish/Portuguese for "people") alongside the English "people," suggesting the graphic may be intended for a bilingual or international audience.
• Scale: The measurements provided (0.90m to 2.10m) reflect standard architectural guidelines for public and private circulation spaces.
• Color Coding: Each panel features a colored circle (light blue, teal, green, and a white outline) likely used to categorize different levels of spatial "service" or traffic flow.

a detailed architectural cross-section of a sustainable, energy-efficient "passive" house. It uses a combination of diagrams, labels, and 3D modeling to illustrate how renewable energy systems and smart design choices work together to minimize environmental impact.
The house is designed with a dramatic sloping roof oriented toward the sun (South) to maximize solar gain. Here is a breakdown of the key systems shown:

1. SOLAR ENERGY HARVESTING
• Solar Cells (Photovoltaic Panels): The primary roof section features 150 square meters of PV panels, estimated to produce 19,200 kWh per year.
• Solar Collectors: A smaller section of the roof (16 square meters) is dedicated to thermal solar collectors, generating 4,000 kWh per year specifically for heating water.
• Optimal Angle: The roof is tilted at a 19-degree slope to optimize exposure to the sun’s rays.

2. THERMAL MANAGEMENT & HEATING
• Thermal Mass: The interior walls and floors are designed to act as thermal mass, absorbing heat during the day and releasing it slowly at night to stabilize indoor temperatures.
• The Boiler & Energy Well: The central boiler is a hub that receives heated water from multiple sources: solar collectors, an underground energy well, the air ventilation system, and water heat recovery systems.
• Heat Recovery:
• Air: Excess heat from indoor air is captured and used to pre-heat incoming fresh air and tap water.
• Grey Water: A heat recovery system extracts energy from drain water (from showers/sinks) before it leaves the house.
• Radiant Heating: The home uses radiant floor heating and high-efficiency radiators (one per floor) to distribute warmth.

3. STRUCTURAL & PASSIVE DESIGN
• Efficient Insulation: The thick exterior envelope is labeled as having high-performance insulation to prevent heat loss.
• Windows with Good U-Value: The glass surfaces are designed for high thermal resistance (low U-value), allowing light in while keeping heat from escaping.
• Atrium: A central glass-walled atrium acts as a "light well," bringing natural daylight deep into the lower levels of the home.
• Passive Sun Shading: Exterior shading devices are used to block intense summer sun while allowing lower winter sun to warm the interior.

4. RESOURCE MANAGEMENT
• Rainwater Collection: A system on the right side of the house collects rainwater from the roof, which is then diverted for use in the garden and toilets.
• Automation: The diagram notes that light and air are "automatically controlled based on use and need," suggesting a smart home integration system to further reduce waste.

𝗠𝗔𝗚𝗞𝗔𝗡𝗢 𝗔𝗡𝗚 𝗕𝗔𝗬𝗔𝗗 𝗦𝗔 𝗕𝗨𝗜𝗟𝗗𝗜𝗡𝗚 𝗣𝗘𝗥𝗠𝗜𝗧?
Isa ito sa pinaka-karaniwang tanong kapag magpapatayo ng bahay o gusali. Marami ang nagugulat dahil akala nila “maliit lang” ang building permit — pero sa totoo lang, may basehan at proseso ito.

𝗔𝗡𝗢 𝗔𝗡𝗚 𝗕𝗜𝗡𝗔𝗕𝗔𝗬𝗔𝗥𝗔𝗡?
Ang building permit ay hindi lang isang papel. Ito ay binubuo ng iba’t ibang fees na dumadaan sa pagsusuri ng LGU.

𝗠𝗚𝗔 𝗞𝗔𝗦𝗔𝗠𝗔 𝗦𝗔 𝗕𝗔𝗬𝗔𝗗:
• Building Permit Fee
• Electrical Permit
• Plumbing Permit
• Mechanical Permit (kung meron)
• Zoning Clearance
• Fire Safety Evaluation Fee
• Line and Grade Fee
• Contractor’s Tax
• Documentary Stamp at iba pang regulatory fees

𝗠𝗔𝗚𝗞𝗔𝗡𝗢 𝗜𝗧𝗢 𝗞𝗔𝗗𝗔𝗟𝗔𝗦𝗔𝗡?
Sa pangkalahatan, ang building permit cost ay nasa “humigit-kumulang”:
• 𝟭% hanggang 𝟮% ng estimated construction cost
(depende sa LGU, laki ng proyekto, at uri ng building)
Halimbawa:
Kung ang estimated cost ng bahay ay ₱3,000,000
Maaaring nasa ₱30,000 hanggang ₱60,000 ang total permit fees

𝗕𝗔𝗞𝗜𝗧 𝗠𝗔𝗛𝗔𝗟𝗔𝗚𝗔 𝗔𝗡𝗚 𝗕𝗨𝗜𝗟𝗗𝗜𝗡𝗚 𝗣𝗘𝗥𝗠𝗜𝗧?
• Legal ang construction
• Nasusunod ang National Building Code
• Mas ligtas ang istruktura
• Iwas-demolition at penalties
• Kailangan sa future selling o loan ng property

𝗣𝗔𝗔𝗟𝗔𝗟𝗔:
Magkakaiba ang singil bawat LGU. Laging i-check ang latest schedule of fees ng inyong city o municipality at siguraduhing kumpleto ang pirma ng mga licensed professionals.
Kung may balak kang magpatayo, mas mainam na i-budget na agad ang building permit para iwas delay sa construction.