{"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/04\/Coin-Stack-a-Penny-Bridge-Step-6.jpg\/v4-460px-Coin-Stack-a-Penny-Bridge-Step-6.jpg","bigUrl":"\/images\/thumb\/0\/04\/Coin-Stack-a-Penny-Bridge-Step-6.jpg\/aid48003-v4-728px-Coin-Stack-a-Penny-Bridge-Step-6.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"484","licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/2.5\/\">Creative Commons<\/a><br>

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<\/p><\/div>"} 6 Expand on the bridge by starting over and putting an extra triad on top of each stack. This technique will create a bridge the width of 2 pennies, as seen in the photo.

{"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/38\/Coin-Stack-a-Penny-Bridge-Step-7.jpg\/v4-460px-Coin-Stack-a-Penny-Bridge-Step-7.jpg","bigUrl":"\/images\/thumb\/3\/38\/Coin-Stack-a-Penny-Bridge-Step-7.jpg\/aid48003-v4-728px-Coin-Stack-a-Penny-Bridge-Step-7.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"484","licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/2.5\/\">Creative Commons<\/a><br>

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<\/p><\/div>"} 7 Expand again to a 3 penny wide bridge. To do the penny bridge with a width of 3 pennies, do the same thing that you did for the 2 penny wide, except you put 3 pennies in the middle. With making the bridges with a larger span, put as many triads as there are pennies wide. Next, just fill up all the "spaces" between the triads, and keep going.