| ng chair is not very common and is made of | | | | vehicles to prevent damage of neck of |
| rough wood to give him a rustic glance. This tilting | | | | “whiplash injury” in collisions a |
| chair not very common is made of rough wood | | | | posteriori where the head is launched behind |
| to give him a rustic glance. The design of chair | | | | suddenly. The wide chairs have typically at least |
| considers the envisaged use, ergonomics (as it | | | | files of size of shoulder to shift the weight with |
| comfortable is for the occupying one), as well as | | | | the shoulders with the place right of the lower |
| functional conditions not-ergonomic such as the | | | | back. Some chairs have rest of foot. A stool or |
| size, the capacity of pile, the capacity of fold, the | | | | any other simple chair can have a bar right or |
| weight, longevity, the resistance of spot and the | | | | curved simple close to the bottom which it is |
| artistic design. The envisaged use determines the | | | | necessary that the guard of children places its |
| position of sited places desired. “To | | | | feet above. A chair of kneeling adds an additional |
| charge the chairs”, or any chair intended | | | | part of body, the knees, to support the weight of |
| for the people to work at an office or a table, | | | | the body. Rest-to hold the chair distributes the |
| including dinner of the chairs, can only rest very | | | | major part of the weight of the occupant to the |
| slightly; otherwise the occupant is too remote | | | | feet. Church chairs Church chairs Beaucoup of |
| office or table. Dental chairs are necessarily | | | | chairs is upholstered or has cushions. The filling can |
| rested. The easy chairs for the television of | | | | be on the seat of the chair only, the seat and the |
| observation or films are some share in the | | | | back, or also on any rest of arm and/or rest of |
| interval according to the size of the screen. | | | | foot the chair can have. The filling will not shift the |
| The ergonomic designs distribute the weight of | | | | weight with various parts of the body (unless the |
| the occupant to various parts of the body. A seat | | | | chair is so soft that the form is changed). |
| which is higher results in the balancing feet and | | | | However, upholstering distributes the weight by |
| pressure increased on the lower part of the | | | | increasing the surface of contact between the |
| knees (“fold political”). It can also | | | | chair and the body. A chair out of wooden lasts |
| have as consequence no weight on the feet | | | | feels hard because the point of contact between |
| which means more weight elsewhere. A lower | | | | the occupant and the chair is small. |
| seat can shift too much weight with the | | | | The same body weight above a smaller sector |
| “bones of seat” (“sciatic | | | | means greater pressure on this sector. The |
| tuberosities”). A wide seat and back will | | | | propagation of the sector reduces the pressure |
| shift the weight with the occupant behind. This | | | | to any point given. Instead of the filling, flexible |
| can be more comfortable for some by reducing | | | | materials, such as the wicker, can be employed in |
| the weight on the sector of seat, but can be | | | | the place with the similar effects to distribute the |
| problematic for others which have bad back. | | | | weight. Since the major part of the body weight |
| Generally if the occupant east suppose to rest for | | | | is constant in the back of the seat, upholstering |
| a long time, weight must be removed the sector | | | | there should be firmer than before seat which has |
| of seat and of the “easy” chairs | | | | only the weight of the legs to support. The chairs |
| intended for long periods of the meeting generally | | | | which have a filling which is the same ones before |
| at least are slightly rested thus. However, to rest | | | | and backs of density will feel soft in the sector |
| cannot be appropriate for the chairs intended for | | | | back and hard with the lower part of the knees. |
| work or to eat with the table. The back of the | | | | There can be cases where the filling is not |
| chair will support part of the weight of the | | | | desirable. For example, in the chairs which are |
| occupant, reducing the weight on other parts of | | | | planned mainly for the external use. Where the |
| the body. | | | | filling is not desirable, to circumvent can be |
| Generally the files come in three faces: To lower | | | | employed in the place. A circumvented pan of |
| the support of files behind only the lumbar area. | | | | seat tries to distribute the weight without filling. By |
| To shoulder the files of size the back and the | | | | matching the shape of the buttocks of the |
| shoulders entireties support. The head-rests | | | | occupant, the weight is distributed and of the |
| support the head as well and are important in | | | | maximum pressure is reduced. |