It is not a proportion. There needs to be aroubd a 75 degree angle from the ground to the base. If it is too flat the ladder can slip out from underneath you. If it is too steep you can tip back. There is usually an angle at the bottom of the ladder if that is flat on the ground then that should be the safest angle (75 degrees)
Extension Ladder
yes
6.7 metres
ladders,ramps,and stairs
There is no other name for Chutes and Ladders. That is is the only commonly used name for the board game. Other people may have "nick names" for it, but other then that it has none.
Depending on the height.
Depending on the height.
It is possible to purchase extension ladders from most homeware or hardware stores. Purchases can be made online from companies such as Wickes, Homebase or local suppliers. It is also possible to purchase online from places such as Amazon.
Extension Ladder
1 million extension ladder
Most loft ladders are built like extension ladders, that is to say they slide telescopically into sections. This means when they are stored away they take up less space than a step ladder, but this storage space is in the loft.
The practicalities aside, it obviously depends on the length of the ladders. Taking a typical "home" ladder of 4m and a mean distance of 385,000km to the Moon, you would need about 96,250,000 ladders.
You would want to start a ground floor window washing business as it is more affordable to start. It caters to storefronts and single story building so it does not require extension ladders, scaffolding or lifts.
Fire escape ladders are a useful invention for those that are stuck in a building that has fire inside of it and you need to jump or climb off in order to save your life. They don't sell these ladders because they are too long.
They crawl across extension ladders that have been laid flat across the cravass's of the Kumba (spelling?) icefalls.
You can purchase a 24' ladder at Sears for $159 or at Ron's Home and Hardware for $217 in Lawrenceville, GA. Amazon.com also offers 24' extension ladders.
Telesteps, the well known brand name of extension ladders can be purchased from your local Home Depot, but may have to be ordered online. Additionally there are a plethora of competing manufactures of telescoping ladders carried by Home Depot as well as other home improvement stores such as Lowes and Ace's hardware.