Canopy (building)-is an overhead roof or else a structure over with covering, able to provide shade or shelter from weather conditions such as sun, hail, snow and rain.[1] A canopy can also be a tent, generally without a floor. The word comes from the Ancient Greek κωνώπειον (konópeion, “cover to keep insects off”), from κώνωψ (kónops, “cone-face”), which is a bahuvrihi compound meaning “mosquito”. The first ‘o’ changing into ‘a’ may be due to influence from the place name Canopus, Egypt thought of as a place of luxuries.
Architectural canopies include projections giving protection from the weather, or merely decoration. Such canopies are supported by the building to which they are attached and often also by a ground mounting provided by not less than two stanchions, or upright support posts.
Canopies can also stand alone, such as a fabric covered gazebo or cabana. Fabric canopies can meet various design needs. Many modern fabrics are long-lasting, bright, easily cleaned, strong and flame-retardant. This material can be vinyl, acrylic, polyester or canvas.[2] Modern frame materials offer high strength-to-weight ratios and corrosion resistance. The proper combination of these properties can result in safe, strong, economical and attractive products.
canopy may refer to 活動帳篷
- (aircraft), transparent enclosure over aircraft cockpit
- (biology), aboveground portion of plant community or crop (including forests)
- (building), overhead roof or structure that provides shade or other shelter
- (film), a 2013 Australian war film
- (grape), aboveground portion of grapevine
- (hotel), a brand within the corporate structure of Hilton Worldwide
- (parachute), cloth and suspension line portion of parachute
- Group, U.S. investment firm
- of state, cloth or permanent architectural feature that hangs over altar or throne as symbol of authority
- Camper shell, raised, rigid covering for the rear bed of a pickup truck
- Chuppah, used in Jewish wedding ceremonies
- Honda Canopy, three-wheeled automobile from Honda
- Motorola Canopy, wireless broadband solutions
- OP , Canadian Forces Operation
- Umbraculum’, awarded by pope to basilicas
- Vapor canopy, creationist idea that earth was surrounded by a “canopy” of water
- Vehicle , type of overhead door for vehicle
帳篷是一種可移動的建築。骨架由帳杆、營繩來組成並固定,骨架外鋪的是外帳,可以遮擋視線以及風雨。帳篷可以很方便地搭建、拆除和運輸。有些帳篷是不固定的,直接扎在野外,有些則拴在地面的樁子上。最初使用帳篷的是遊牧民族,現在帳篷主要用於露營。現代帳篷要求帳布採用不易燃的材料。
帳篷的大小差別很大,從單人帳篷一直到可以容納上千人的大帳篷(比如馬戲團的帳篷)。
野營用的帳篷一般可以方便地運輸,小型的帳篷甚至可以當作背包、放在自行車上或者放在皮艇里。根據帳篷大小和搭帳篷的熟練程度,一般可在5至25分鐘內搭建完畢,拆帳篷一般也需要相同的時間。
大多數國家的軍隊在戰場上使用帳篷作為軍隊臨時居住和工作的建築。
概述
帳篷面料可採用帆布、尼龍、皮毛、聚脂纖維等。由於布料吸水,在潮濕的情況下會變得非常重。但是濕布膨脹後其小孔被堵住,因此濕布比乾布的防水性更好。尼龍和聚脂纖維比布輕,基本上不吸水,覆蓋一定防水層後它們可以具有非常好的防水性能,但由於紫外線破壞,會逐漸老化。一個帳篷的接縫處更加容易漏水,因此有的將接縫處進行壓膠處理。
防水度參數給出的是在多少毫米處的水壓下依然防水。比如防水度1000毫米的材料可以抵擋陣雨,防水度1500毫米的材料可以在夏季宿營使用,終年在外的帳篷一般需要耐水度2000毫米以上,要抵檔特殊情況的探險帳篷一般需要防水度3000毫米以上。帳底的防水度一般需要在5000毫米以上。