[TYPO3-english] escape character in TypoScript

[Fernando Arconada]

This slice of TypoScript doesnt work cause of the replacement of the '{' 
with the insertData, how can avoid it? any idea?
30 = TEXT
30.value (
	<style>
	#map {
	  width: 100%;
	  height: {field:height}px;
	  border: 1px solid #000;
	}
	</style>
)
30.insertData = 1

Kind Regards

Fernando Arconada