A CAD block is a named set of drawing objects saved as one reusable object inside a drawing file. Drafters insert blocks for doors, furniture, fixtures and sheet borders so repeated content stays consistent, edits reach every copy at once, and the file stays smaller than the same geometry drawn...
A load-bearing wall supports the weight of the building above it, carrying loads from floors, ceilings, and the roof down to the foundation. A partition wall only divides interior space and supports nothing beyond its own weight. The difference matters most during renovations, because removing a load-bearing wall without temporary...
A waffle slab is a reinforced concrete floor system made of a thin top slab supported by a grid of ribs running in two directions, which leaves a waffle-like pattern on the underside. It is used where floors must carry heavy loads across long spans, typically 9 to 15 meters,...
A shear wall is a vertical structural element designed to resist lateral forces, mainly wind and earthquake loads, that act parallel to its plane. Built from reinforced concrete, wood panels, masonry, or steel, a shear wall collects horizontal forces from the floors and roof and carries them down to the...
Formwork in concrete construction is the temporary mould that contains fresh concrete, shapes it to the required dimensions, and supports it until the material gains enough strength to carry its own weight. Crews build most formwork from timber, plywood, steel, or aluminum, then strip it away once the concrete has...
Glulam and CLT are both engineered mass timber products, but they solve different structural problems. Glulam bonds lumber with all grain running parallel, producing strong beams, columns, and arches. CLT glues boards in crossing layers to create solid panels for walls, floors, and roofs. Most large timber buildings use both...
Cross-laminated timber (CLT) is a prefabricated engineered wood panel made from at least three layers of solid-sawn lumber, with each layer glued at a right angle to the one below it. The crosswise layup gives the panel strength in two directions, so a single CLT panel can act as a...
A tuned mass damper is a heavy mass, usually steel or concrete, mounted near the top of a tall building and tuned to swing against the structure's natural sway. By moving out of phase with wind or earthquake motion, it absorbs vibration energy and keeps the building stable and comfortable....
A space frame structure is a three-dimensional truss built from straight members connected at nodes, arranged so loads spread in every direction. Because each member carries only tension or compression, the system stays extremely light while spanning 100 meters or more, which makes it a favorite for airports, stadiums, and...
Skyscrapers stay up because two systems work together: a deep foundation that transfers the building's weight to firm soil or bedrock, and a stiff vertical skeleton of columns, cores, and frames that resists wind and earthquake forces. Every load, from gravity to a typhoon gust, follows a continuous path down...
R-value measures how well a material resists heat flow, while U-value measures how fast heat passes through a complete building assembly. The two are reciprocals: U equals 1 divided by R. A higher R-value means better insulation, a lower U-value means better performance, and each metric dominates a different part...
The core of a tall building is the vertical spine that contains elevators, fire stairs, and service risers, and in most towers it also acts as the main structural element resisting wind and earthquake forces. Depending on the building's use and site, architects place the core at the center, edge,...
A vapor barrier is a material that slows or stops water vapor from diffusing through walls, roofs, and floors. Its resistance is measured in perms, and Class I materials such as polyethylene sheeting block vapor almost completely. In cold climates it goes on the warm interior side of the insulation;...
A thermal bridge is a localized weak point in a building envelope where heat flows faster than through the surrounding construction. Steel beams, concrete balcony slabs, and wall studs are common examples. Thermal bridges raise heating and cooling bills, lower interior surface temperatures, and can trigger condensation and mold growth...
Passive cooling is a building design approach that keeps indoor spaces comfortable in warm weather without mechanical air conditioning. It relies on shading, natural ventilation, thermal mass, reflective surfaces, and smart orientation to block unwanted heat and move it out of the building using wind, buoyancy, and nighttime temperature drops....
A double-skin facade is a building envelope made of two layers, usually glass, separated by an air cavity that ranges from 20 centimeters to 2 meters wide. Air moving through the cavity buffers the interior from heat, cold, wind, and noise, which lowers energy use and improves occupant comfort. You...
A green roof is a roof assembly that supports living vegetation over a waterproof membrane, with dedicated layers for drainage, root protection, and a growing medium. The two main types are extensive (shallow and lightweight) and intensive (deep and garden-like). Green roofs cut stormwater runoff, lower cooling loads, and extend...
A brise-soleil, French for sun breaker, is an exterior shading structure, usually a set of horizontal or vertical fins fixed to a facade, that blocks direct summer sun before it reaches the glass. It cuts solar heat gain and glare while still letting in daylight and the lower winter sun,...
A Trombe wall is a thick, sun facing wall of masonry or water containers set directly behind a pane of glass. It absorbs solar radiation during the day, stores the energy in its mass, and releases the heat into the building after sunset. Because it needs no pumps, fans, or...
LEED certification is a third-party rating system that scores buildings on energy, water, materials, indoor environmental quality, and site impact. Run by the U.S. Green Building Council, it awards points across credit categories and grants four levels: Certified (40-49 points), Silver (50-59), Gold (60-79), and Platinum (80 or more). You...
