o0小惠惠0o
电梯lg的意思是地下一层，lg是英文lower ground的缩写，意为地面下一层，也就是负一楼或地下车库第一层。 lg在一些大型建筑物中也很常见，表示“地下”，许多高层的楼在标记商家位置时也常用到lg和l。
竹林听雨57
英国习惯叫楼宇地面(即1楼)为 Ground floor ，简写G。UG 即 Up ground floor ，指的是地面之上的一层，可理解为2楼或阁楼，甚至1楼与2楼之间的间格空间。LG 即 Low Ground floor ，就是地面下一层，可理解为-1楼或地库第一层。那么LG2 即地库第二层……
总的来说，
1. B1、B2的 B 是 Basement（地下室）的首字母，是指地下楼层，但现在通常指【地下车库】。
2. L1、L2的 L 是 Level（楼层）的首字母，也可以叫1F、2F，这里F就是floor了，但数字要写在F前面。
2. G/GF: Ground Floor（一楼，英式用法）
3. LG：Lower Ground（地下楼层）
4. UG: Upper Ground（地上楼层）
5. M 层：mezzanine（夹层）
不少大楼的大厅是挑高的，会有一个“夹层”（mezzanine），也叫 M 层。另外，现在流行的 loft 公寓的二层也叫 mezzanine.
注意：有的楼宇标识既有LG1、LG2，又有B1、B2，比如下图是上海iapm，这里LG指的是地下商场，而B指的是地下停车场。
下面这张图把楼层的英文表达总结得比较清楚。左英右美。
可以看出，英美对“一楼”的界定有重大不同，但涉及到“地下楼层”，英美的表述一致。
未暖rabbit
20 thick cement mortar 1:2.5 80 thick C15 concrete 70 thick gravel cushion Su-soil foundation Dampproof layer doped C20 fine aggregate concrete waterproofing agent 10 thick 1:2 cement mortar including squarrosa 20 thick 1:2 cement mortar plus waterproof agent Noodles Cement mortar drainage trench 1:20 Sheet surface 1:3 cement mortar 100 thick reinforced concrete slab 8 thick防滑地砖 22 thick paste layer of cement mortar 1:2.5 50 small stone thick layer of concrete poured the whole 06 @ 200 with a two-way reinforced Ramp profile Stainless Steel Brick time Filling sealing material Pool cover details Length L30 * 50 * 6 Finished cast iron plate Indoor surface Frame structure Cast-in-place reinforced concrete structure construction of the ground floor should be reserved for the construction surface layer thickness, the first level-story building set aside 80mm ,1-3 level-story building set aside 50mm Doors and windows are the size of the hole size, dimensions in mm Architectural Design Help Total Plan Kitchen, bathroom complete the floor surface should be lower than the adjacent 20mm, the ground should be omitted geotropism direction pan of water, ground water to be done to deal with. Are used in polyurethane waterproof coating to make 40 fine aggregate concrete thick layer of protection. Outdoor terrace and outdoor corridors, platforms 凡需hanging flat-topped upper floor room with its construction design requirements set aside by hanging bars or buried pieces. Wall The use of local common wall filled wall Homemade cement hollow brick The interior walls are: in the door,窗洞connections should legislate accordingly墙厚size reinforced concrete columns and beams have been poured at the same time trace. Reinforced concrete column reinforcement and details, see the structure of working drawings. The materials used to paint the inside and outside the walls and practices detailed in the table with the materials used to paint the part of the external walls. Moisture-proof walls Skirtboard The ground should slope to drain the direction of the gradient of 1% ~ 5%, to drain the mouth elevation above sea level should be below ground 20mm, floor drain to a radius of 250mm as the central framework, drainage slope should be 3% -5% Ground waterproof layer should be迎水面done in structural layer above Leveling Rust-proof steel components are required to do a second coat, finish second. Unless otherwise indicated, The projects are mainly aluminum alloy windows Site elevation and the ramp, road drainage see the total plan Green venues are detailed layout design Landscape Settlement joint Joints 6 thick leveling layer of cement mortar 1:1.5 Color wall paint a face at the end of the Second Mao stone, cultural stone Shimizu tile layer White latex paint at the end of a second 20 thick polished granite or marble 200 thick layer of cement cinder Su-soil foundation A total construction area On the ground floor area Underground construction area Covers an area of building area Building density FAR Greening rate Building low-rise Building height Units than Wall Groundwater King room See semi-basement retaining wall. . Septic tanks 500 W polymer waterproof coating Angle The basement floor and wall waterproofing details Waterproofing membrane Open the direction of plate Overhaul 1:10 manhole node details Steel ladder Expansion bolts Hinge, bolt, galvanized iron sheets, 60 * 40 frame, galvanized steel pipes, to reconcile the Chatham Disabled ramp enlarge plane Potting cement mortar, cement mortar plastering, asphalt caulking Flange, screw fastening solid Gutter inclined roof drainage Roof profile large samples 1:10 The roof of the chimney, parapet Iron railings manufacturers detailed design Embedded iron Indoor and outdoor window railing Facade flower details, asphalt Please refer to detailed matters not related to the construction and acceptance of national norms. Road sections The structural design of the total note The works do seismic design, special-shaped column frame Secondary level of security Independent foundation Design basis Second beam, main beam, main beam主筋 Large sloping roof-like structure Retaining wall section Based on floor plan Structural layer floor elevation One column layout Network Based on the top surface to the second floor of the floor Floor beam reinforcement plan The layer structure elevation: -0.050; undated beam surface elevation with the corresponding plate surface elevation Primary and secondary beam junction to be in the main beam with both sides of the additional three stirrups, the diameter of the original主筋with stirrups, spacing of 50 and are in the main beam re-attached tendon hanging. Contour meeting press map interface beam stirrups encryption: Undated thickness for 100mm Roof beam reinforcement plan Basement floor structure Not specified for the distribution of tendons. . Stretching from the main beam semi-platform elevation Encryption scope column stirrups一些翻译不出来，不好意思- -
